A gerund is a form of a verb that ends in -ing that is used as a noun. ... It looks like a verb, but it acts like a noun. For example, the word swimming is an example of a gerund. We can use the word swimming in a sentence as a noun to refer to the act of moving around in water as in Swimming is fun
I'm pretty sure you should click the second bubble. That one looks like its correct. The other ones have wrongly placed commas so that's the only one that makes sense to me. Hope this helps! =^-^=
