The word "prone" means lying on one's side. The best choice is "flat," which means horizontal. Something that lays on its side is horizontal. Considering the other choices, "urgent" means necessary and pressing, "rural" means pertaining to the countryside or having characteristics of country life, and "positive" means certain, optimistic, or carrying an electrical charge that is the opposite of negative.

The best answer choice is balanced since the verb poised means to be balanced or suspended.

"Isolated" is an adjective meaning alone or solitary, so the answer choice closest in meaning to "isolated" is "separate," which is an adjective that means apart or distinct. Considering the other choices, "similar" is an adjective meaning alike, "combined" is an adjective meaning joined, and "united" is an adjective meaning together.

The word "derelict" means abandoned and run-down. The best choice is "abandoned" because it is a part of the definition of "derelict." Considering the other choices, "direct" means proceeding on the shortest course, "strong" means showing great power, and "vague" means unclear.

The word "verdant" means green or  covered in green vegetation. The best choice is "lush," which can also mean covered in lots of green vegetation. Considering the other choices, "canine" means having the characteristics of a dog, "fabricated" means artificially created, and "peaceful" means calm.

The word "ubiquitous" means present everywhere. The best choice is "omnipresent" since it also means present everywhere.

The best answer choice is bleak.  Desolate refers to something that is bleak or depressing and barren.

“Provincial” means unsophisticated or characterized by simple and localized understanding. To provide further help, “unstoppable” means not able to be stopped; “implausible” means not believable; “implied” means suggested. 

Do not be tricked by our normal use of the word "novel" to speak of a particular kind of book—a fictional story generally. The original meaning for the word is "new." It comes from the Latin "novus" meaning new. We see this Latin root in other words like "novelty" and "novice." The options "fictional," "textbook," and "recreational" all try to trick you into thinking of the more familiar form of "novel" referring to the type of book. Do not fall for this trick, however! All of these options are not even exactly synonymous with that meaning! Instead, for the reasons already mentioned, the best option is "new".

Tardy is an adjective describing something that is delayed, overdue, or sluggish. The correct synonym therefore is "late." "Tardy" has to do with timeliness not speed, so "quick" is not a direct antonym. "Tasty" has to do with taste, not timeliness.