Organisms are the biotic parts of an ecosystem.
Answer:
having crops that can grow at any temperature is the answer!
Actually a living thing is not a system. Every part of our body, like our lungs brain or heart, can be seen as a separate system. Therefore we are giant arrays of systems working together to keep you alive
A, B, and C make no sense
A makes no sense because Methane is lighter than air, and so the Methane would stay higher in the atmosphere, so it would not seep into the ground, it would remain in the air.
B makes no sense because Burning fossil fuels causes air pollution by increasing the amount of carbon dioxide in the air. the only way that carbon dioxide could pollute water is if it is combined on a molecular level, plus carbon dioxide does not inhibit the process of water being evaporated by the sun.
C also makes no sense because Deforestation causes acid rain by increasing carbon dioxide not decreasing carbon dioxide in the atmosphere.
so therefore by elimination your answer is D
