Well all your doing is writing a paragraph about variation and pressures that can change the characteristics of population along with an example
The answer is A.) decomposition
Got a 100% Hope that helps
C.) Uracil is your answer.....
Answer:
In the scenario given above, Elodea Canadensis which produces extremely high amount of oxygen is used in raising fishes placed in a tank. This oxygen is needed for easier living in the tank. <em>In a situation whereby the Elondea Canadensis is not present in the tank, the fish would struggle to leave comfortably in the tank. with time, the water will become clouded with carbon-dioxide. This would lead to the fish dying due to lack of oxygen.</em>
Explanation: