Hope this helps with the answer to your question
Answer:
nitrogen gas and oxygen gas.
Explanation:
78% of earths atmosphere is made up of nitrogen and 21% is made up of oxygen.
Answer: all answers are correct
Explanation:
If a species of creatures homes were destroyed like lets say humming bird for an example, they move into a colder habbitat in whch they are not used to, so some survive and some dont because of natural selection. The ones whom survived later inhearated thicker fur.
If you want more details look at finches variations of beaks accordng to their habbtat on google
