As the actors' bows, the audience claps wildly.
Explanation
A subject plus verb agreement implies that both elements should agree by forming grammatically correct sentences.
In simple terms, both parts need either to be in singular or plural.
It is essential to note that you cannot combine both singular and plural phrases in the sentence.
Some rules should be followed when writing a sentence to form a subject-verb agreement.
The most important rule is that there are subjects that take a singular verb even if the meaning is plural like in the given case.