Alight metal used in aerospace industries

How long does it take for saturn to orbit the sun?

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

From the standpoint of geography,a is an internal rendering of an individual's known world