Which sentence contains a misplaced modifier?

Solution:

A misplaced modifier is a word, phrase, or clause that is improperly separated from the word it modifies/complements. In sentence 2, the phrase "with a trunk" is placed too far from the noun "elephant" that it is intended to modify. This creates an awkward and humorous image.

1. The dog chased the ball into the yard. (No misplaced modifier)
2. I saw an elephant with a trunk walking down the street. (Misplaced modifier: 'with a trunk')
3. She carefully placed the vase on the table. (No misplaced modifier)
4. He quickly finished the homework. (No misplaced modifier)

Answer: I saw an elephant with a trunk walking down the street.