The backwaters of Kerala are formed by a network of:

The correct answer is d) All of the above.

The backwaters of Kerala are a vast network of interconnected rivers, lakes, and canals. They are formed by the Western Ghats, which run parallel to the coast of Kerala. The Western Ghats are a mountain range that receives a lot of rainfall. This rainfall flows down the mountains and into the rivers, which then flow into the lakes and canals. The backwaters are a popular tourist destination, and they are also an important part of the local economy.

Here is a brief description of each option:

• Rivers: Rivers are natural watercourses that flow from high ground to low ground. They are formed by the runoff of rainwater and snowmelt. Rivers are an important source of water for drinking, irrigation, and transportation.
• Lakes: Lakes are bodies of water that are surrounded by land. They are formed by the damming of rivers, the collapse of underground caves, or the impact of meteorites. Lakes are an important habitat for fish, birds, and other wildlife.
• Lagoons: Lagoons are shallow, saltwater bodies of water that are separated from the ocean by a barrier reef or sandbar. They are formed by the accumulation of sediment and the growth of coral reefs. Lagoons are an important habitat for fish, shellfish, and other marine life.