The noun form of the adjective 'active' is activeness.A related noun form is activity.
very significant
Yes, you could say so. "Active" is an adjective. It is used to modify or describe other words.It should be noted that active is also a verb (as in to be active).
active person
I would describe that person as being Friendly.
The team is actively working on the project to meet the deadline.
well..pauper means poor ,so i think that it's describing a person so it should be an adjectiveAdditional answerNo, pauper is a noun. It's not describing a person, any more than thief is describing someone. It IS that person. You might have a white pauper, in which case the word white is describing what sort of pauper he is.
phenotype
A teachable person
poor
A cartographer
a description to how a person looks also describing what that person is wearing