I believe a. is the answer
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Psycho social mean of or relating to the interrelation of social factor and individual thought out an behaver Physical aspect mean to a particular part or feature of something
Answer: The liver.. :
Your liver is your body's largest solid organ. On average, it weighs around 3 pounds in adulthood and is roughly the size of a football. This organ is vital to the body's metabolic functions and immune system. Without a functioning liver, a person cannot survive.
Explanation: Pretty cool if you ask me.
Swimming because it uses all body strength! they actually use it for physical therapy too!
