The correct answer is (b), the Amazon River. The Amazon River is the second longest river in the world, after the Nile River. It is located in South America and flows from the Andes Mountains to the Atlantic Ocean. The Amazon River is the largest river by discharge volume, and it is also the largest river by drainage basin area. The Amazon River is home to a wide variety of plant and animal life, and it is an important source of water for millions of people.
The Nile River is the longest river in the world, and it is located in Africa. The Nile River flows from Lake Victoria to the Mediterranean Sea. The Nile River is an important source of water for Egypt and Sudan.
The Mississippi River is the second longest river in the United States, and it is the 20th longest river in the world. The Mississippi River flows from Minnesota to the Gulf of Mexico. The Mississippi River is an important source of water for the United States.
The Yangtze River is the longest river in China, and it is the third longest river in the world. The Yangtze River flows from the Qinghai-Tibet Plateau to the East China Sea. The Yangtze River is an important source of water for China.