Please help me I will mark as brainlist to do the quesitons

Pollution from a factory that produces cleaning products is an_

Greg goes to a high school and observes the way students talk to each other. he makes notes on the words used, the atmosphere of the school and the way the students present themselves to each other. this is an example of a( research method.

The bishnoi conservationist is take care of nature and grow with it, instead of exploiting it explain the statement