You need to show the sentence first
It means most important. For example, a priority for you would be to get good grades. It's currently the most important thing for you right now.
Monkeys are like teachers. They teach the young how to do things that will help them throughout their lifetime.
Technology is one thing but the internet is another. TECHNOLOGY, thats one of man's greatest inventions so far. It's really not costing humans anything. Other than... Eyesight? I guess? Every time second after second I guess were losing a bit. Just a tiny bit of our eyesight. Although i'm pretty sure that was not your question. Well, I honestly do not really know.
Answer:
Verb : You can document something (write it down)
Noun : You write on documents (a piece of paper containging information)
Explanation:
A verb is an action, so when you document something you are completeing an action.
A noun is a person, place or thing, so a document (a thing) is a noun.