The phrase "in a nutshell" is an idiom meaning to describe something briefly or concisely.

The phrase "in a nutshell" is an idiom meaning to describe something briefly or concisely. A. To describe something briefly

A conjunction is a word used to connect clauses or sentences or to coordinate words in the same clause. "But" is a conjunction. A. But

The opposite of "old" is "new". A. New

An adverb modifies a verb, an adjective, or another adverb. Adverbs often end in "-ly". "Slowly" is an adverb. A. Slowly

The word "ambiguous" means open to more than one interpretation; having a double meaning; unclear or inexact. B. Unclear