Exchange of nutrients and wastes with the body cells by diffusion takes place throught the walls of the

i-i-i-i-i-i don't k-k-k-k-know.

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.