Oxygen is going to be the answer
They have resulted in the extinction of native species
Some factors that affect the mouse include, the amount km food Is availabl, the amount of water, and how cold or hot the temperature is!
It's common knowledge that trees become bare during winter, but not many people know how trees keep themselves alive during the bitter cold. ... The first part of dormancy is when trees lose their leaves. They don't make food in the winter, so they have no use for masses of leaves that would require energy to maintain.