The ER allows proteins to leave the cell golgi.
Active transport
requires energy. This is because it is going against the natural process of diffusion. Substances diffuse when their net movement is down the concentration gradient (from higher concentration to lower). Active transport is movement from lower concentration to higher. Cytosis (phagocytosis , pinocytosis) also requires energy.
Sea lions use their back, hind flippers and front flippers to easily glide in the water.
Therefore, sea lions is the answer.
It was proposed by a scientist named Charles Darwin.