What makes stars produce energy?
O gravity
O hydrogen
O nuclear fusion
O nuclear fission

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.

Where the main factor that enabled the growth of cities and civilizations was the existence of

Arow of elements on the periodic table is called an