Question

fix any punctuation or capitalization errors below. click \submit answer\ if there are none.
darwin watterson pulled a white rabbit out of his hat and the audience applauded wildly.

Explanation:

The sentence has two independent clauses ("Darwin Watterson pulled a white rabbit out of his hat" and "the audience applauded wildly") connected by "and". To show the separation of these two independent clauses more clearly, a comma should be placed before "and" when the clauses are of similar importance and the conjunction is used. So we add a comma after "hat".

Answer:

Darwin Watterson pulled a white rabbit out of his hat, and the audience applauded wildly.