Select the locations of the world's earliest river valley civilizations.

The locations of the world's earliest river valley civilizations are:

1. Mesopotamia: Located in present-day Iraq, between the Tigris and Euphrates rivers.
2. Egypt: Located along the Nile River in present-day Egypt.
3. Indus Valley: Located in present-day Pakistan and northwest India, along the Indus River.
4. Yellow River (China): Located in present-day China, along the Yellow River.
5. Mesoamerica: This includes the Olmec and Maya civilizations, located in present-day Mexico and Central America, along various rivers such as the Usumacinta and Grijalva rivers.

The world's earliest river valley civilizations emerged in the following locations:

1. Mesopotamia: This ancient civilization developed in the region known as the Fertile Crescent, located between the Tigris and Euphrates rivers in what is now modern-day Iraq and parts of Syria, Turkey, and Iran. The Sumerians, Akkadians, Babylonians, and Assyrians are some of the prominent civilizations that thrived in this area.

2. Egypt: The ancient Egyptian civilization flourished along the Nile River in northeastern Africa. The Nile River, with its annual floods, provided fertile land for agriculture, allowing the Egyptians to build a prosperous civilization that lasted for thousands of years.

3. Indus Valley: This civilization arose around the Indus River in what is now modern-day Pakistan and northwest India. The major cities of Mohenjo-daro and Harappa were centers of this ancient civilization, known for its advanced urban planning, sewage systems, and trade networks.

4. Yellow River (Huang He) Valley: Known as the cradle of Chinese civilization, this region developed around the Yellow River in northern China. The earliest Chinese dynasties, such as the Xia and Shang, emerged in this area and relied on the river for agriculture and transportation.

5. Tigris-Euphrates River system: Known as the ancient civilization of Sumer, this region was located in present-day southern Iraq and Kuwait. The Tigris and Euphrates rivers provided water and fertile soil for agriculture, and Sumerians created the first known written script, invented the wheel, and developed advanced city-states.

These river valleys were crucial for the development of agriculture, trade, and urbanization, laying the foundation for some of the world's oldest civilizations.

To identify the locations of the world's earliest river valley civilizations, we need to consider archaeological and historical evidence. Here are some regions where these civilizations thrived:

1. Mesopotamia: Located in modern-day Iraq, this region was home to ancient Sumerian, Babylonian, and Assyrian civilizations. It was nourished by the Tigris and Euphrates rivers.

2. Nile River Valley: Situated in Egypt, this region owes its prosperity to the Nile River. The ancient Egyptians built a highly advanced civilization along its banks.

3. Indus River Valley: In what is now Pakistan and northwestern India, the Indus River Valley was home to the Indus Valley Civilization. Its major cities include Harappa and Mohenjo-daro.

4. Yellow River (Huang He) Valley: Located in China, the Yellow River Valley was the cradle of the ancient Chinese civilization. It is associated with the Shang and Zhou dynasties.

5. Ganges River Valley: Situated in modern-day India and Bangladesh, this region flourished along the banks of the Ganges River. It played a vital role in the development of the ancient Indian civilization.

To determine the earliest river valley civilizations, archeologists analyze ancient artifacts, writings, ruins, and other findings. This helps them to date and locate the rise of these early societies.