The answer is C:BIOLOGICAL DIVERSITY.
INFORM ME IF I AM WRONG.
They produce pockets (eggs) for fertilization and they produce the reproductive hormones, oestrogen and progesterone.
Answer: C
Explanation: Left ventricle. With the thickest muscle mass of all the chambers, the left ventricle is the hardest pumping part of the heart, as it pumps blood that flows to the heart and rest of the body other than the lungs.
The most prominent example of carbon fixation is photosynthesis