Well depending on what the environmental change is the organisms will have to adapt, or move. if they don't they may not survive.
comment if you want an example or 2
I would say for number three the answer would be 3
Two main ways. Free elections, casting your vote for the candidate supporting your goals.
And second, lobbying the sitting government.
Answer:
Something along the lines of burning the waste without the chemicals being released.
Diffusion is the passive transport from a high concentration to a low without using energy. homeostasis results from balance.
