Palghat Gap, major break in the Western Ghats mountain range, in southwestern India. Located between the Nilgiri Hills to the north and the Anaimalai Hills to the south, it is about 20 miles (32 km) wide and straddles the Kerala–Tamil Nadu border, serving as a major communication route between those two states.

Palakkad gap is a geographical feature located in the Western Ghats of India. It is a low mountain pass or a gap that connects the states of Kerala and Tamil Nadu. Here is a detailed explanation of the answer:

1. Geographical Location:
- The Palakkad gap is situated in the Western Ghats, which is a mountain range that runs parallel to the western coast of India.
- It is located in the southern part of the Western Ghats, specifically between the Nilgiri Hills in Tamil Nadu and the Palakkad Hills in Kerala.

2. Connecting Kerala and Tamil Nadu:
- The Palakkad gap serves as a major passage or route connecting the states of Kerala and Tamil Nadu.
- It is a natural passage through the mountain range, allowing easy movement of people, goods, and transportation between the two states.

3. Importance for Trade and Transportation:
- The Palakkad gap is of significant importance for trade and transportation between Kerala and Tamil Nadu.
- It provides a shorter and more convenient route for road and rail transport, as compared to alternative routes that involve crossing higher mountain ranges.
- The gap facilitates the movement of goods, agricultural produce, and people between the two states, contributing to their economic integration.

4. Impact on Climate:
- The Palakkad gap also has an impact on the climate of the region.
- It acts as a channel for the southwest monsoon winds, allowing them to penetrate into the interior parts of Tamil Nadu and Kerala.
- As a result, the Palakkad gap receives higher rainfall compared to the surrounding areas, making it a significant water source for agriculture and other activities.

Conclusion:
In conclusion, the Palakkad gap connects the states of Kerala and Tamil Nadu. It is a low mountain pass in the Western Ghats that serves as a crucial route for trade, transportation, and the movement of people between the two states. Additionally, it plays a role in influencing the regional climate by facilitating the entry of monsoon winds and contributing to increased rainfall in the area.