The study of distribution of living organism is kow as demography, while studying their fosils is known as paleantology.
I’m pretty sure it’s physical
Are tobacco, sun exposure and radiation exposure
Answer:Digestive and muscular systems would be working together to chew food and work it down to the stomach to be digested. The digestive system and circulatory circulatory system would be working together to break food down and move nutrients to cells. The nervous system decides what to eat and when to chew.
Explanation:
There are less trees and plants to absorb CO2 (carbon dioxide) and convert it to oxygen.
