The best answer choice is:
It allowed them to completely clear fields of natural vegetation and fertilize the soil with ashes.
Explanation: Slash and burn agriculture, also known as swidden farming, involved cutting down and burning trees and plants in a particular area to clear the land for cultivation. This process not only provided the Maya with fertile land for planting crops but also fertilized the soil with ashes from the burned vegetation. This helped them overcome challenges in the natural world by optimizing their agricultural productivity and ensuring a sustainable food supply. Additionally, the clearing of land allowed for more efficient land management and crop rotation practices.