The answer is either B or D. Letter A doesn't make sense and letter C isn't right either because you need rainfall to have fertile plains.
Answer: A tropical rain forest climate is typically hot and wet.
Explanation:
1) define the steps of your experiment2) describe what is happening3)write conclusion
I believe the answer you are looking for is the "Neolithic Period".
since water holds heat longer, regions near the sea/ other large bodies of waters will usually have a stable climate throughout the seasons
