Answer: The complete predicate of the sentence provided is "is not as easy as it looks".
Step-by-step explanation: The complete predicate of a sentence includes the main verb, which indicates what the subject is, is doing or feeling, and also all the other words that accompany it, that is to say the modifiers. In that way, unlike the simple predicate, the complete predicates contains other elements besides the main verb. In the sentence "Relaxing is not as easy as it looks", the complete predicate is "is not as easy as it looks", which is made up of the main verb "is", the adverb "not" and the comparative structure "as easy as it looks". The complete predicate is defining and providing additional information about the subject "Relaxing".