I think it's B: DNA replication
The nitrogen containing amino group is recycled while the remainder of the molecule is excreted in the urine
Yes
None of them produce their own energy
I would say that the most correct statement is the following one:
Certain types of renewable energy can be used for as many applications as certain types of nonrenewable resources.
Let's take for example the energy from solar panels (the renewable energy source) and the energy from burning fossil fuels: this energy can be used in the same situations!
