Process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
The answer to your question is c because ecology is in fact the study of ecosystems; how organisms interact with their surroundings
Some of the important questions to be asked should be: Is the procedure of obtaining the results accurate? If not, by how much is its reliability? Are the results useful for further scientific research? What can you recommend to others who might want to make the same scientific conclusions?
DNA is the ultimate control of cell's productions. So A.
