Which word must be able to be switched with the word "because" for it to be a conjunction?

The correct answer to this question is for. A word is a conjunction when it joins other words, as well as phrases, clauses, and sentences together. There are three types of conjunctions, which are coordinating conjunction, correlative conjunctions, and subordinating conjunctions. Coordinating and subordinating are the two most known ones. A coordinating conjunction joins words that have equal meanings.

FANBOY is a popular phrase used for identifying them. F = for, A= and, N= nor, B=but, O=or, Y=yet, S= so. Subordinating conjunctions like two clauses together. An example is a word while. Correlative conjunctions are pairs of conjunctions that are used together. An example is either or.