Final answer:
The compound predicate in the sentence is 'drew the sketch and painted it,' as it contains two actions referring to the same subject connected by the conjunction 'and.'
Step-by-step explanation:
The compound predicate in the sentence "Tom drew the sketch and painted it" is "drew the sketch and painted it." This is because a compound predicate consists of two or more predicates or verbs that share the same subject and are joined by a conjunction such as 'and.' In this sentence, 'drew' and 'painted' are verbs that refer to the same subject, 'Tom,' indicating the actions that Tom has performed.