What is a gerund, and how does it function in a sentence?

I believe the answers questions and answers are put in random order.

For the 8th grade Gerunds quick check, the answers are:
1.What is a gerund, and how does it function in a sentence?
A gerund is a verb ending in -ing that functions as a noun in a sentence.
2.Which sentence includes a gerund?
Swimming in the gulf is Finn's favorite summer activity.
3.How is the gerund functioning in the following sentence?
Traveling offers the opportunity to meet new people and experience new cultures.
answer: as a subject of the sentence
4.Which sentence includes a gerund?
My family is impressed by my cooking.
Your welcome

ty koolkid ur 100% correct

Koolkid is Kool and right in 8/21

@koolkid is 100% correct! Thank youu

kool kid right thx

Still right

koolkid is 100% correct

i mean the one with a k

A gerund is a noun made from a verb root plus ing.

I think?

Koolkid is still right. I only had one wrong but it would have dragged my grade down