A channel of canal where water flows under the influence of gravity is called ______.

flow channel

The correct answer is option 4. flow channel.

A channel of a canal where water flows under the influence of gravity is called Flow channel.

In irrigation and hydraulic engineering, a flow channel refers to a section of a canal or waterway where water flows under the influence of gravity. This term is commonly used to describe the portion of a canal where water moves from a higher elevation to a lower elevation, allowing for the controlled distribution of water for irrigation or other purposes. The design and management of flow channels are crucial for efficient water conveyance and distribution in irrigation systems.