Answer:
subject: children and adults
simple predicate: prepare
complete predicate: prepare for the holiday by decorating their homes with symbols of springtime
Explanation:
<u>The subject of a sentence is its topic - what the sentence is about -, or what or who performs the action described by the verb.</u> In this case, the ones who prepare are "children and adults".
<u>The simple predicate of a sentence is the verb or verb phrase that indicates the action performed or the state of being. It can also be a linking verb.</u> In this case, the simple predicate is "prepare".
<u>The complete predicate includes everything that is not the subject. </u>Therefore, the complete predicate in this case is "prepare for the holiday by decorating their homes with symbols of springtime."