I believe your answer is going to be (C)
A. ocean temperatures declining
Answer:
New food and fiber crops were introduced to Eurasia and Africa, improving diets and fomenting trade there.
Answer:
The biggest disadvantage of coal is that it will one day run out with how fast the economy is using it today. It also creates carbon dioxide, which is hard to breath and also clogs up the atmosphere, making it thicker and trapping more heat. a better alternative is wind, solar, and water energy. these are clean, electronic ways to power and save our world
Explanation:
