To make a compound sentence, a writer uses a (blank)
to connect two independent clauses.

Coordinating conjunction
Dependent clause
Conjunctive adverb
Subordinating conjunction

Coordinating conjunctions are used to connect the two clauses.
Think about FANBOYS

The answer is coordinating conjunction. A coordinating conjunction are words used such as “and,” “but,” “or,” “for,” or “nor” that connects two complete thoughts together in a sentence. And example of this would be: I like to comb my hair, and I like to brush my teeth. These are two complete sentences connected by a coordinating conjunction.