"Marina" comes from the same Latin roots as "maritime" (located or having to do with the sea), "mariner" (sailor), and "marine" (living in an ocean or sea), so we can infer that it will have something to do with the ocean. A "marina" is the place in which boats are kept when they are not being sailed. This makes "harbor" the correct answer, as it is closest in meaning to "marina." As for the other answer choices, a “commentator” is someone who talks about what is happening as it is happening to explain it to other people watching it; a “moderator” is someone who listens to two people and tries to stop them from fighting and help them reach an agreement; a “professor” is a teacher at university; and one meaning of "captain" is someone who is in charge of a ship.

A “junction” is the physical place or location where two things join, so the best answer choice is “connection,” which means link between two things. As for the other answer choices, “demonstration” is an act of showing of how something works or is done by seeing it done as an example; an “implication” is suggestion or what something suggests will happen; an “application” is a formal request for something; and "eradication” means the act of completely killing off or getting rid of something.

"Foliage" means leaves and greenery, so "vegetation" is the best answer choice. As for the other answer choices, "food" means substance that is eaten in order to gain nutrients and energy; "nutrient" means vitamin that supports survival and growth; "forest" means wooded area or large group of trees; and "herbivore" means plant-eating animal.

A "talisman" is a symbol that is thought to bring good luck. It could be a necklace or a lucky rabbit's foot, or anything a person believes is lucky. A "charm" means the same thing. The word "talisman" is a noun, so you should have eliminated words that weren't nouns when looking at the answers. This leaves only "charm" and "stone."

The "nucleus" is the core or center of something. To provide further help, "homicide" means murder; "larceny" means thievery; a "felony" is a crime; the "periphery" is what is on the outskirts. The "periphery" is opposite to the "nucleus." 

"Income" means money earned through a job, wages, salary. To provide further help, an "outlier" is something or someone that falls well outside the center of a group, something unusual, a unique piece of data; a "companion" is a friend, someone who is with you; an "accomplice" is a person who assists another person in committing a crime.

A "vocation" is a job or an occupation. To provide further help, a "committee" is a group of people who meet to decide something; a "syndicate" is a group of people who work together to further their common interests; an "arbiter" is a person given power to settle a disagreement, the person who makes the decision.

A "feat" is an accomplishment, something achieved or completed. To provide further help, a "hardship" is a difficulty; a "nuisance" is something irritating or annoying.

The "onset" of something is the start of something, the beginning. To provide further help, an "intermission" is a break in the middle of a performance. A "pause" is a temporary cessation of speech or activity. "End" is an antonym to "onset." You might "delay" the "onset" of something, but the two words are not close to being synonymous.

An "adhesive" is something sticky, like glue, used to stick two objects together. While "wood glue" can be a useful tool, by itself "wood" refers to a solid substance drawn from trees. "Friend" is a liked companion, and thus mostly unrelated. "Enemy" is an antonym to "friend." "Mirrors" while often framed by "wood" and held together with an "adhesive" (like wood glue!) it is unrelated as a noun to the word "adhesive."