Why do we call earth the blue planet? what makes it look blue from space?

a
the water in the oceans only
b
the water in the atmosphere only
c
the water in the oceans and atmosphere
d
none of the above

Which of the following lakes is not found in africa?

Which of the following statements about pesticides and residue is false? a. most conventionally grown produce has detectable levels of pesticides when purchased from the store. b. the us government has determined that small levels of pesticides in produce is safe for humanconsumption. c. organic produce always will be pesticide-free. d. farm workers, children, and pregnant women are at greatest health risk from pesticides. select the best answer from the choices provided.

How would i answer this for an exam?