The correct answer is Nile.![image](//cdn. Points

• The Nile is the longest river in the world, stretching approximately 6,650 kilometers (4,130 miles).

• It flows through 11 countries in northeastern Africa, including Egypt, Sudan, and Ethiopia, and has two major tributaries: the White Nile and the Blue Nile.

• The White Nile, originating from Lake Victoria in Uganda, is considered the primary stream of the Nile.

• The Blue Nile starts from Lake Tana in Ethiopia and contributes the majority of the water and silt to the Nile River.

• The Nile has been crucial to human civilization for thousands of years, especially in Egypt, where it provided fertile land for agriculture through its annual flooding cycles.

• The river supports millions of people in the region and serves as a significant source for irrigation, drinking water, and hydropower.![image](//cdn. Information**

• Amazon River

• The Amazon River in South America is the largest river by discharge volume of water in the world and spans approximately 6,400 kilometers (3,976 miles).

• It flows mainly through Brazil and Peru, with its basin covering parts of multiple countries in South America.

• The Amazon rainforest surrounding the river is considered the world's largest tropical rainforest and is home to rich biodiversity.

• While the Nile is longer, there is some debate among scientists about whether the Amazon could be considered the longest river due to variations in measuring techniques.

• Yangtze River

• The Yangtze River is the longest river in Asia and the third-longest in the world, spanning about 6,300 kilometers (3,917 miles).

• It flows entirely within China, originating from the Tibetan Plateau and emptying into the East China Sea.

• The river is a vital waterway for transportation, agriculture, and industry in China, and it is home to the Three Gorges Dam, the world's largest hydropower project.

• Mississippi River

• The Mississippi River, located in the United States, is one of the longest rivers in North America, stretching approximately 3,766 kilometers (2,340 miles).

• It flows from its source at Lake Itasca in Minnesota and empties into the Gulf of Mexico.

• Combined with its major tributary, the Missouri River, the Mississippi-Missouri system is one of the largest river systems in the world.

• The river is vital for commerce, agriculture, and recreation in the United States.