Great rivers are large, flowing bodies of water that play a crucial role in the environment and human civilization. They provide habitats for diverse wildlife, support ecosystems, and are vital for agriculture, transportation, and industry. Examples of great rivers include the Amazon, Nile, and Mississippi. These rivers often shape the landscapes they traverse, creating valleys and deltas. They also serve as important cultural and historical landmarks, influencing the development of cities and communities along their banks. Many great rivers are essential for drinking water and recreational activities, making them invaluable resources for people around the world.