Its either A or C. thats all i can say though but B and D you can rule out. I hope i helped a little
Answer:
A group of cells make a tissue, a group of tissues make and organ, a group of organs make an organ system, and an organ system makes a organism.
Answer:
A. Urinary system its the one system that holds waste
Explanation:
By the heat of the enegry
C.) depend on the same resources
Competition is the rivalry between living things for territory, resources, goods, mates, etc. It is a symbiotic relationship that occurs in nature. Same or different members of species compete for resources, especially for limited natural resources.