What did the United States government do to help reverse the process of desertification?

Coordinating area and water the board to shield soils from disintegration, salinization, and different types of debasement. Securing the vegetative spread, which can be a significant instrument for soil preservation against wind and water disintegration.

Explanation:

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)