What must occur for entropy to decrease?
a. energy must be added to the system.
b. energy must be removed from the system.
c. the first law of thermodynamics must be broken.
d. the second law of thermodynamics must be broken.

D) Entropy can be though of as the universe's tendency to want to make things into more dissolved forms

Adescription of  congestive heart  failure, its symptoms, risk factors, and treatment. to the  heart muscle  other than by artery or blood  flow  problems; signs of  heart  failure may not  meanthe patient has  heart  failure and they quit alcohol, or at least consume alcohol within the national recommended  limits.

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.