Answer :
Answer: D) reveal.
Explanation: The simple predicate is the main verb in the predicate that tells what the subject does (it doesn't include any modifiers or complements). In the given sentence, the subject is "Fossils" and despite having two verbs ("reveal" and "lived"), the one that expresses what the action that is performed by the subject, is "reveal," so the correct answer is the corresponding to option D.
