Most animal cell membrances have protein that pump ions out of the cell potassium ions into the cell

is this a psat question, if so do not cheat try your best.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

answer; (b) clear with a slight blue tint;