Final answer:
Rivers contributed to the beginning of farming communities by providing a consistent water source for irrigation. The correct answer is B.
Step-by-step explanation:
The geographic feature that contributed to the beginning of farming communities was rivers. In areas like Mesopotamia, southern Turkey, and Israel, rivers such as the Tigris, Euphrates, and Nile provided a consistent water source for irrigation, which supported farming and allowed for the development of settled communities. For example, in Mesopotamia, the need to divert floodwaters and irrigate farmlands near the rivers led to the coordination of irrigation systems, bringing people together and contributing to the formation of early urban centers. The correct answer is B.