A group of giraffes feed on leaves from the treetops. Right now, the giraffes are not eating; the sun has gone down, leaving the grassland in darkness. What is happening
to the carbon in the trees and in the giraffes? Is carbon moving into the living things,
moving out of the living things, or both?
a) Carbon is moving into and out of the living things at the same time.
b) Carbon is only moving into the living things; it is not moving out of them.
c) Carbon is only moving out of the living things; it is not moving into them.
d) none of the above