Answer:
<u>Prehistoric people could not record history</u>, for <u>they had not invented writing</u>.
Explanation:
Compound sentences are sentences that consist of at least two independent clauses connected by a semicolon or a coordinating conjunction preceded by a comma.
Independent clauses are clauses that can stand alone as a sentence. This means that they contain all elements a sentence should contain (a subject and predicate) and express a complete thought.
The given compound sentence consists of two independent clauses connected by the conjunction <em>for</em>:
- <u>Prehistoric people</u> could not record history.
- <u>They </u>had not invented writing.
In case you need to identify the subjects and predicates as well, I've pointed them out. The subjects are underlined, and the predicates are written in bold letters.
