A "border" is a boundary between two things, so "boundary" is the correct answer. As for the other answer choices, a "country" is a nation; "paper" is flat sheets made out of wood pulp that are written on; the "capital" is the major city of a state or country in which the government is headquartered; and "vacation" means a break or time off from work or school.

"Ache" and "soreness" both relate to dull pain that one can feel. 

“Parcel” is a noun that can mean “a thing or collection of things wrapped in paper in order to be carried or sent by mail,” so we need to pick out an answer choice that means something like “a thing wrapped in paper to be sent by mail.” That means that “paper” cannot be the correct answer, because if a “parcel” is by definition wrapped in paper, it is probably not paper itself. “Package,” however, is a word that when used as a noun, can mean “an object or group of objects wrapped in paper or plastic, or packed in a box,” and because “package” is the answer choice closest in meaning to “parcel,” “package” is the correct answer.

"Coating" can refer to a thin layer of a particular material, so "layer" is the correct answer. For instance, one might write, "After one coating of paint, you could still see the grain in the wood of the dresser, but after the second coating of paint, it was completely covered up."

"Coast" means the shore.

Your “torso” is part of your upper body, your trunk or chest, so "chest" is the correct answer. A “helmet” is something you wear to protect your head. 

A "photograph" is a picture.

“Route” is a word that can be used as a verb or a noun, but because all of the answer choices are nouns, we will need to consider “route” as a noun. When used as a noun, “route” means “a way taken in getting from a starting point to a destination,” so we need to pick out an answer choice that means something like “a way” or “a course.” That means that “map” cannot be the correct answer, because while a map may show a route, “map” does not mean the same thing as “route.” “Path,” however, is a noun that can mean “a track laid down for walking, or made through continual passage” or “ the direction in which something is moving,” and because “path” is the answer choice closest in meaning to “route,” “path” is the correct answer.

A “task” is a job, a role, or a responsibility within a larger project. To provide further help, one's “wage” is the amount of money one earns from working a specific job; a “wish” is a hope; a “nightmare” is a bad dream; and an “ordeal” is something you suffer through.

"Cluster" is a bunch; a Weapon is an item used to harm others; a Soldier is a member of the army; Section means a part; and a government means the person or people that rules.