Overproduction obviously benefits the survival of fish species greatly.
Answer:
According to the biological species concept, organisms belong to the same species if they can interbreed to produce viable, fertile offspring. Species are separated from one another by prezygotic and postzygotic barriers, which prevent mating or the production of viable, fertile offspring.
The answer to your question is A., as the random movement is a movement
Both use oxygen, both produce energy, both give out carbon dioxide as the result and the overall chemical reactions are the same.
Hope this helps :)