Answer:
it's answer is B
the ocean once covered an area that is now dry
The correct answer to this is:
“Astrocytes”
Astrocytes also called star cells due to their shape are the
most abundant glial cells in the brain. Extensions from these cells encase
capillaries and offer extra control over which materials enter or leave the
intercellular fluid of the CNS thus acting like a permeability membrane.
B~Direction, hope this helps.
Merry Christmas & Happy Holidays! =)