On steep slopes and mountains, reduce erosion by creating level areas for crops.

D. Terracing

Explanation:

Terracing is a type of landscaping characteristic for steep slopes and mountains. Graduated terraces are used to farm on this kind of terrain to reduce erosion. This way crops are planted on graduated level areas and not on steep terrain, and risk of surface runoff is reduced.

b. read the phase at the intersection of any given temperature and pressure.