Which actions are involved in the immune response?
a).regulating hormonal and autonomous responses
b).identifying and destroying harmful substances
c).increasing and supporting the ability of red blood cells to carry oxygen
d)regulating and adjusting the skin's secretion of sweat and oil

The answer is

As temperature increases, so does phospholipid bilayer fluidity. At lower temperatures, phospholipids in the bilayer do not have as much kinetic energy and they cluster together more closely, increasing intermolecular interactions and decreasing membrane fluidity.