¿Cómo se forman los ríos?

Rivers are vital for ecosystems and human needs, providing resources like food, energy, and transportation. They form from mountain precipitation and glacier melt, creating tributaries that join to form larger rivers. Erosion shapes riverbeds and can create waterfalls. Rivers may form deltas where they meet the sea. The Amazon River, fed by the Andes and a vast watershed, is a significant example, contributing a fifth of the world's river flow. Rivers are crucial for the water cycle, ecological balance, and human survival.

Describe the process of erosion in riverbeds.

What is a delta and how is it formed?