Under development of the brain.
Biological realm..............
Answer:
The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
B: used up in the process
When photosynthesis occurs the plant takes in sunlight and CO2 and converts it into (C6H12O6) or sugar and O2