Answer:
C. Fitness
Explanation:
Fitness refers to the physical condition of living organisms. If the organisms are fit so it can survive in that environment and increases their population by the process of reproduction but if the organisms are unfit in that environment so they remain less in numbers and with the passage of time, they are fully eliminated from that environment. So fitness is very important for the survival of an organism.
Answer: Fitness
Explanation: fitness is the living condition of a living organism