Idon’t know it a is correct tell me the right answer

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

What is the correct term for living the most sustainable life you can within your current circumstances?

What is the independent variable in this investigation? mass volume sample number substance density