Some rivers in Manipur are used for transportation, especially in:

The correct answer is: All of the above.

Some rivers in Manipur are used for transportation, especially in the hilly regions, remote areas, and during the monsoon season. In the hilly regions, rivers are often the only way to get around. They are also used to transport goods and people to and from remote areas. During the monsoon season, rivers are often the only way to get around because roads are often washed out.

Here are some additional details about each option:

• The hilly regions: Manipur is a hilly state, and many of its rivers are located in these areas. Rivers are often the only way to get around in these areas because roads are often not well-developed.
• Remote areas: There are many remote areas in Manipur, and rivers are often the only way to get to these areas. Rivers are also used to transport goods and people to and from these areas.
• During the monsoon season: The monsoon season is a time of heavy rains in Manipur. During this time, roads are often washed out, and rivers are often the only way to get around.