Answer:
The independent variable would be the hours you sleep, and the dependent variable, is academic performance. Because you want to check that academic performance depends on the hours.
Most infectious disease will be caused by one of four types of germs:
Bacteria – single-celled organisms that reproduce themselves, by themselves.
Virus – microorganisms that cannot reproduce themselves; they take over the cells they infect in order to reproduce and spread.
D is the answer due to lack of knowledge and accessibility
Formation of arms and legs