The answer to this is Gonads.
Answer:
Plants and animals depend upon each other as mutual interdependence is must for their survival. Plants provide shelter for animals and they make oxygen for the animals to live. When animals die they decompose and become natural fertilizer plants. Plants depend on animals for nutrients, pollination and seed dispersal.
Explanation:
I think D because the whole thing is gaseous and it has two atmospheric layers
Answer:
It is affected by the concentration gradient.
Diffusion stops, when the concentrations of the substance on either side of the barrier become equal.
Explanation: