The best answer is "decorations". The word "regalia" usually refers to royal possesions which are very decorative. They can include ceremonial clothes, designs, or emblems. "Clothes" simply refers to garments or apparel. The defining characteristic of regalia is that is is very decorative, and the word clothes does not imply this meaning. The word "regions" is unrelated, and the remaining words, "fancy" and "royalty," are words one might use when talking about "regalia," but are not "regalia" themselves.

"Labyrinth" is a noun defined as a complicated maze, so "maze" is the correct answer because it is closest in meaning to "labyrinth."

A "conduit" is a channel or a passage for carrying a fluid. It is also a means by which something is transmitted. So, "channel" is the correct answer. None of the other answers are close in meaning to "conduit": “bidder” means a person making an offer to buy something at a certain price, usually in the context of an auction or sale;“mask” means cover or disguise;“cinema” means motion picture or theater; and“world” means the E arth or an imagined place like the Earth.

"Shanty" is a shack or small hut. "Omen" is a sign or warning of the future. "Etiquette" is socially accepted manners or customs. "Messenger" is a person who delivers letters and messages. "Abyss" is a deep hole or gap.

A synonym for "memento" is "keepsake," which means something special that reminds someone of something. A "bracelet" or "toy" can each be a memento, while an "heir" can be someone who inherits some type of memento, but none of these words mean "memento." The word "money" is unrelated.

A “cavity” is a hole or hollow space (usually used to describe a hole in a tooth). The correct answer is “void” which also means emptiness, lacking in something.

"Abode" means a home or a residence, so "home" is the correct answer. An "office" is a workplace. A "library" is a place that allows patrons to check out and borrow books for periods of time or where students go to study. An "airport" is a place where people go to board planes for trips. A "train station" is a place where people go to board trains.

An "emblem" is a symbolic representation that serves as badge for a nation, organization, or family.

A burrow is a hole or tunnel, usually a small animal's home.