Answer:
You take any of the "signs of change in populations of organisms and their environments". For imagine, Australopithecus (early man) turning to Homo sapiens. In that way they could tell that you took this journey.
They both need nutrients to carry out life functions
Carbon is an important component in living things as it is present in the food of living things in the form of saccharides such as glucose and polysaccarhides such as starch. Hence the answer to this problem should have to be A. Carbon is a source of energy.
Answer:
To process food and nutrients that benefit our body
