The primary energy source in the united states is:
a. solar energy
b. nuclear power
c. fossil fuel
d. hydroelectric power

An atom of element a has 73 protons. what would the element's atomic number be?

How is citizenship achieved in the united states? check all that apply. citizenship by birth citizenship by residency citizenship by naturalization citizenship by employment citizenship by immigration

Why hasn’t the us already stopped birth tourism?give an explanatory response.