The correct answer is c) High Ranges.
The High Ranges are a mountain range in the Western Ghats of Kerala, India. They are the highest and most densely forested region in the state. The High Ranges are home to many waterfalls, including the Athirappilly Falls, the tallest waterfall in Kerala.
The Midland region is a plateau in the central part of Kerala. It is a relatively dry region with a low population density. The Midland region is home to some waterfalls, but not as many as the High Ranges.
The Malabar Coast is a coastal region in the northern part of Kerala. It is a tropical region with a high population density. The Malabar Coast is home to some waterfalls, but not as many as the High Ranges.
The Palakkad region is a district in the central part of Kerala. It is a relatively dry region with a low population density. The Palakkad region is home to some waterfalls, but not as many as the High Ranges.