Is my Macbook Air using Adobe Acrobat Reader DC?

I have Adobe Acrobat Reader DC installed on my Macbook. It takes up almost 1GB of space, and I want to free up space. I don't know for sure that I ever use the reader.

I have these questions.

1. How can I know if I even use the reader? I read PDF files often.
2. There must be alternatives to this reader. What would be the cons of deleting Adobe Acrobat Reader DC?

Also, about 220MB of space is being used for various Adobe folders and apps aside from the reader. I'll lop all this off too if I'm not using any of it, or if there are alternatives that would be just as good, and wouldn't take up so much space.

1. I've also got Adobe Application Manager installed, taking up about 117MB, over several folders. I don't recognize anything in these folders. How can I know if I do anything on the computer that uses these apps?

Seems Adobe might be linked to Microsoft in some way. I don't use any Microsoft apps, so I sure don't wanna hang onto any Adobe products just because they're needed for MS apps. I've only got Mojave 10.14.6 installed. Not interested in updating.

I sure don't expect or hope for answers from heaven that will make everything clear for me. But I'd appreciate any pointers, hints, questions, etc.

Thanks very much :)