How have people in North Africa modified the environment to make it more suitable for farming?
(1 point)
• They have constructed terraces on mountainsides to create more farmland.
• They have used slash-and-burn agriculture to enrich the soil.
• They have imported crops that grow well in a dry environment.
• They have used irrigation to carry water from rivers to crops.
• They have constructed terraces on mountainsides to create more farmland.
• They have used irrigation to carry water from rivers to crops.