Parasites harbor infectious diseases. What else do parasites
do?
A. They give organisms a sudden burst of energy.
B. They allow the host to stay up longer.
C. They steal the host's energy.
D. They bring balance to the host's digestive
system.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )