Can you mke sure the answers to the stuff people ask in correct ?

How do i mark the brainliest on

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy

What are the four most common physiochemical changes that are used to determine time of death