Which sentence includes a gerund?

My family is impressed by my cooking.
My family is impressed by my cooking.

The runners are lacing up their shoes.
The runners are lacing up their shoes.

A healthy breakfast of steaming hot biscuits is served.
A healthy breakfast of steaming hot biscuits is served.

I am running a marathon this weekend.

I am running a marathon this weekend.

The sentence that includes a gerund is: "My family is impressed by my cooking."

The sentence that includes a gerund is "I am running a marathon this weekend." To identify the gerund in this sentence, you need to understand what a gerund is. A gerund is a verb that ends in "-ing" and functions as a noun in a sentence.

In this sentence, the gerund is "running." It ends in "-ing" and functions as the subject of the sentence, describing the action or activity that the speaker (or the implied subject) will be doing.