Why does stream or river water temperature vary across a 24-hour period?

option c is the correct answer.

i believe the answer would be b. hope it : )

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive

i am sorry but i need more information and a picture.