"How do bacteria cause strep throat?" is A. a problem statement
B. a hypothesis
C. a theory
D. data analysis

Which one

What are some characteristics of a free enterprise economy?

What goes in and out of a cell respiration?

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)