The term to describe a pure substance made up of only one type of atom is a chemical element.
Can you please specify? Are there any answer choices, What are the moving objects in question?
I'll say Graph C cause both Graph A and Graph C look slighty different but both are close to being the same but in Graph C it shows different Figures Both don't match each other hence Population of birds in Graph C are specialized in different types of food.
Secondary due to the fact that there was an ecosystem already there before the sidewalk was built over it
The answer to the question above is BLOOD. In addition to what have been already stated above, blood also transport hormones and other signals throughout the body, regulates body pH and core body temperature. As we all know, blood is composed of RBC's, WBC's, and plasma.