Respuesta :
A. Because humans are polluting the ecosystem with there green house gas.
The environmental changes may affect several populations in an ecosystem.
What are environmental changes?
Environmental changes refer to the changes or disturbance taking place in the environment typically due to human influences or natural ecological processes.
The effects of environment changes can be observed on both, the humans and animals. They are the reason of human interference and affect the food chain and food web. They significantly affect the ecosystem and the living organisms therein.
Therefore the correct option is A.
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