What is primary function of the highlighted vessel? a) blood supply to the scalp b) blood supply to muscles of mastication c) blood supply to facial muscles d) blood supply to the brain

Confused on question what should we be answering

Ithink the answer is d.

Well,what i learned was that unlike many other  endothermic  reactions,  photosynthesis  does not absorb energy as heat. instead, during plants absorb energy from sunlight to turn carbon dioxide and water into oxygen and glucose, which is a type of sugar molecule. the energy is stored in the glucose molecules, ready to be used when needed.