Answer:
Nuclear Fusion that takes place between hydrogen atoms.
Explanation:
The energy comes from the sun and the sun is mostly made up of hydrogen and helium atoms. The sun generates energy from nuclear fusion.
Hydrogen is being converted into helium in the core of the sun. This is called nuclear fusion.
Answer:
D. They dug drainage ditches. i think
Explanation:
Increase energy as it falls
Political if you are talking about where the country meet another and its a natural boundary if it is physical like a river or mountain range
