What is listening and hearing

The united states constitution gives the the power to regulate interstate commerce.

Small plane just crashed in your neighborhood. you take a fire extinguisher and blankets to the scene, then stand back and silently gather with others on the scene when you realize there is nothing you can do to . in this situation, gathering quietly with others out of reverence and respect is an example of coping.

Which factor contributed to the rise of african empires such as ghana and mali?