Explanations:
Kerala, a state in southern India, is known for its rich geography, including numerous rivers that play a significant role in the state's ecosystem and economy. The question focuses on three specific rivers: the Periyar, Bharathapuzha, and Pamba. Each of these rivers has distinct characteristics and origins that are important to understand for geographical knowledge.
The Periyar river is the longest river in Kerala, originating near the Annamalai hills in the Western Ghats. It flows through various districts of Kerala and eventually empties into the Laccadive Sea. The Periyar river is not associated with the Vembanad lake, which is a large brackish lagoon in the state.
The Bharathapuzha river, also known as the Nila, is the longest east-flowing river in Kerala. It originates in the Anaimalai hills and flows through the districts of Palakkad and Thrissur before emptying into the Arabian Sea. While it is a significant river, it is not the second largest river in Kerala. The second largest river in Kerala is the Pamba, which is longer than the Bharathapuzha.
The Pamba river is the second largest river in Kerala, originating in the Peerumedu plateau in the Western Ghats. It flows through the districts of Pathanamthitta and Alappuzha and eventually merges into the Vembanad lake. The Vembanad lake is a large brackish lagoon that is an important part of the Kerala backwaters and is connected to the Arabian Sea.
Understanding the origins and destinations of these rivers is crucial for geographical knowledge. The Periyar river, while the longest, does not flow into the Vembanad lake. The Bharathapuzha is not the second largest river in Kerala, and the Pamba river does indeed flow into the Vembanad lake. Therefore, the correct statement among the given options is that the Pamba river flows into the Vembanad lake.