Because the environment is faster then the squrrel has to find stuff for the nest and a safe spot
Population is the answer !
Answer:
Grain, species etc..
Explanation:
They were originally used to grind grain or spices or pump water and sawing wood. Now modern windmills are used for electricity.
Red Blood Cells would take up 41% of the blood's overall volume.
The sun. Greenhouse gases absorb heat better. So the more of these gases, the hotter it gets. However, the earth itself is naturally heating, but it goes too fast for live to adjust to the temperatures.