Me with this

elements such as nitrogen, carbon, and oxygen cannot be made or destroyed; they can only change their location by cycling through the biosphere.

true or false?

True

Explanation:

The gases such as nitrogen, carbon, oxygen are present in a certain amount in the atmosphere. This amount is always constant due to the gaseous cycle in our ecosystem. The gaseous cycle is coming under the biogeochemical cycle. Unlike energy and water, these gases go to the atmosphere and then come to the biosphere in a cyclic manner. This gaseous cycle includes the nitrogen cycle, oxygen cycle, and carbon dioxide cycle.  This gaseous cycle justifies the given statement.

c. movement because i took the test and it lets me review my answers

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).