Answer:
The answer is C: Organ
Explanation:
A single organ is made of tissue, which carries out a specific function, multiple organs carrying out multiple functions make them an organ system.
The answer should be that the energy is defined as the ability to do work.
I think the correct answer from the choices listed above is option A. An example of gene flow would be that German immigrants settle in a colony in Eastern Pennsylvania without mixing with the locals. Gene flow is the movement of individuals from one population to another. It is also called migration.<span />
Breaks down over time and becomes dirt
