Choose the correct adverb to fill in the blank:

The athlete jumped __________ over the hurdle.

easily

The correct answer is option (2) easily.

An adverb is needed to describe how the athlete jumped over the hurdle. "Easily" is the appropriate adverb here as it describes the manner in which he jumped, indicating that he jumped with little effort or difficulty. Options (1), (3), and (4) are not adverbs and do not appropriately describe the manner of jumping.