The correct answer is: c) Embankments.
Embankments are raised barriers that are constructed to prevent flooding. They are typically made of earth or stone, and they can be built along rivers, streams, or other bodies of water. Embankments can also be used to protect low-lying areas from flooding.
Dams are structures that are built across rivers to control the flow of water. They can be used to store water for irrigation, drinking water, or hydroelectric power. Dams can also be used to prevent flooding.
Canals are artificial waterways that are constructed to transport water. They can be used for irrigation, transportation, or drainage. Canals can also be used to prevent flooding.
Windbreaks are barriers that are constructed to protect crops or other plants from wind damage. They are typically made of trees or shrubs, and they can be planted in rows or in a checkerboard pattern. Windbreaks can also be used to prevent flooding.
Embankments are the most effective way to mitigate flooding in Assam. They are relatively inexpensive to construct, and they can be built in a variety of locations. Embankments are also relatively easy to maintain, and they can provide a long-term solution to flooding problems.