I believe the answer is A.
Answer: C) a natural resource that humans use to generate energy
So basically its anything found on earth to make energy. This includes nonrenewable sources such as fossil fuels (coal or natural gas), and renewable sources such as wind, hydro or solar.
Yes it is true that veto power is the power to defeat a measure with a single vote. The correct option among the two options that are given in the question is the first option. The President of the United States of America has the veto power to cancel out any bill that the congress sends to him. The Presidents single vote has the power to defeat any bill that the congress sends to him.