I think it’s B having second thoughts
I believe the answer is littoral zones.
Sorry if I'm wrong, Hope this helps.
<span>Answer:The blood-brain
barrier (BHE)
BHE is a barrier that's highly permeability selective and protects
the central nervous system from potential dangers like viruses, bacteria and parasytes that may be circulating int he blood. <span>It is composed of endothelial cells, astrocytes, pericytes.</span></span>
Answer:
rough endoplasmic reticulum
Active transport. this is the only transfer of material that is again the concentration gradient, unlike diffusion or osmosis