"Plummet" means plunge, nosedive, or fall straight down, so "plunge" is the correct answer. None of the other answer choices are close in meaning to "plummet": "deviate" means stray from the normal course or path; "determine" means solve or figure out; "sway" means  move forward and backwards in turn; and "loathe" means despise or hate.

"Scamper" means to run away in a hurry; as such it is closest in meaning to "dash." To further help you, "wanton" means random; "ratify" means approve, especially with regard to lawmaking; "egress" means exit or way out; "dawdle" means to delay or to walk slowly and without purpose. 

"Dispel" is a verb that means to do away with or scatter. The best choice is "scatter" since it is a part of the definition of "dispel." Considering the other options, "enchant" means to put under magical influence literally or figuratively, "spell" is a noun that means list the consecutive letters in a given word, "fall" means to drop from the force of gravity, and "reconsider" means think about a given choice one more time, perhaps going back on one's original decision.

"Cut" is a verb that means to divide with a sharp edge. "Pierce" is the best choice since it shares the meaning to penetrate. Considering the other choices, "sow" means to plant seeds, "repair" means to fix, and "damage" means to harm.

“Seclude” means keep away from other people, or “isolate.” “Pester” means annoy or bother; “depose” means get rid of or overthrow; “hesitate” means delay, pause, or wait in making a decision or acting; and “entail” means involve or require.

To "dissect" something, most often a dead animal, means to cut it apart into pieces in order to study its internal systems and composition. The word can also be used more metaphorically to mean scrutinize something, such as a problem. "Cut up" is thus the correct answer. As for the other answer choices, to “mold” something means to make it into a certain shape; “visit” means come to see briefly; “inform” means tell or convey previously unknown information to; and “chide” means chastise.

"Purge" derives from the same Latin root as "pure" (having no blemishes or unadulterated), so it's not surprising that it means remove something in order to benefit or cleanse the whole. "Remove" is thus the closest listed synonym. To “inhabit” a place or building to live in it; “decline” means decrease or reject in a polite way; “protect” means look after or stop from being hurt or damaged; and "fail" means unsuccessfully attempt to accomplish or achieve something.

"Magnify" means cause to appear bigger through the use of some instrument aiding one's vision, such as a handheld glass lens or a microscope. So, the correct answer is "enlarge." Considering the other answer choices, "display” means visually show, often publicly; “erect” means build a building or, more generally, construct; “repair” means fix; and “pamper” means spoil or let someone have everything they want.

"Fortify" is a verb that can mean "strengthen (a place) with defensive works so as to protect it against attack" or "strengthen or invigorate (someone) mentally or physically," or "strengthen (a drink) with alcohol." So, we need to pick out an answer choice that means something like "strengthen." "Weaken," then, cannot be the correct answer, because "weaken" is an antonym of "strengthen." "Toughen," however, is a verb which means "make or become tougher," and because "toughen" is the answer choice closest in meaning to "fortify," "toughen" is the correct answer.

To "ascend" means to rise or move upwards, so "rise" is the correct answer. To "arbitrate" something, like a dispute, means to judge or make a decision over a dispute or disagreement. To "decline" means to move downwards or lessen. To "identify" means to recognize or or to determine who a person is or what something is. To "justify" means to explain or give reasons for a point of view or choice.