Answer:plants
Explanation:the greener and more vegetated ecosystem is more healthier with plenty of habitat,food and moisture provided for other living organisms and also attracting agents like pollinators .
This can affect the organisms living there because now, their environment is probably different than what they have been living in for a long time, so now they have to adapt to this new environment, and if they don't, the organisms will probably end up dying.
Earth’s global temperature has changed greatly in the past hundreds of years. This is due to how much energy the planet is receiving from the sun and how it radiates back. Another cause is humans, due to deforestation, burning of fossil fuels, pollution, etc.
The answer is external stimulus
