Which sentence includes a gerund? (1 point)

Swimming in the gulf is Finn's favorite summer activity.
While swimming at the beach, Harper found a starfish.
Graham learned to dive at the community swimming pool.
Nash has been swimming since he was five years old.

Swimming in the gulf is Finn's favorite summer activity.

The sentence that includes a gerund is: "Swimming in the gulf is Finn's favorite summer activity."

To determine which sentence includes a gerund, we need to identify a word that functions as a noun and ends in "-ing."

In the sentence, "Swimming in the gulf is Finn's favorite summer activity," the word "Swimming" is a gerund. It ends in "-ing" and functions as the subject of the sentence.

To find this answer, you need to identify the word ending in "-ing" that functions as a noun and is placed at the beginning of the sentence. In this case, "Swimming" fits that description. Therefore, the correct answer is the first sentence: "Swimming in the gulf is Finn's favorite summer activity."