Which of the following is the best example of a civilization working to develop its agriculture and also protect its population?

using crop rotation and terracing
planting crops and hunting
digging canals and levees
making copper and bronze tools

The correct answer is "using crop rotation and terracing"

Explanation:

Crop rotation and terracing are both practices that help to satisfy the agricultural needs of a civilization and also protect its population from damaging the soil and the environment. Terracing is the action of preparing a soil to growth crops on it and crops rotation is the practice of growing different crops sequentially in the same land. These two practices help to keep the soil properties and keep growing crops for a longer time.

b. sec, foreign relations

according to worldatlas.com, the u.s. has an 86% literacy rate.