1.Fossils
2.Location
Scientist use fossils to study body structures and compare them.
Scientist use location to study location to see how organisms used their features to cross water or survive in different temperatures.
This is because the modern lifestyle we're living and people are living in the US is very taxing and can cause people to feel extremely bad about themselves for prolonged periods of time. Furthermore, it's also possible people/doctors are misdiagnosing depression and saying someone is depressed when he or she actually isn't.
The answer is C DNA and that is the answer
Meter is the SI unit for length. :)
