Solar, wind, nuclear, and hydroelectric energy sources are similar in which of the following ways

If the choices are:

A. they are all nonrenewable energy sources 

B. they all require an indirect use of sunlight in order to make electricity 

C. they are all considered alternative energy sources 

D. they all require turbines to spin in order to create electricity

then ans is C

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons