Which component of the blood is part of the body’s immune system? plasma platelets red blood cells white blood cells

The answer is:

D. white blood cells.

what is the statement?

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!