The third one i believe. by region
Researchers found a total of 138 volcanoes in the West Antarctic Ice Sheet overlying the West Antarctic Rift System, 91 of which had never before been identified. Basically they have never seen those types of volcanoes before.
The United States and Canada shifted towards free trade with Mexico.
Answer:
Soil can be lost when poor farming practices are used, causing it to dry out and be eroded away by wind or water, soil can be damaged by not rotating the crops, and therefore depleting the soil
Explanation:
lol