The correct answer is D. The Western Ghats mountain range plays a role in blocking monsoon rains from reaching North Karnataka, increasing rainfall along the coastal region, and regulating temperatures in the state.
The Western Ghats are a mountain range that runs along the western coast of India. They are a major barrier to the flow of moisture-laden air from the Arabian Sea, and this causes the air to rise and cool, resulting in heavy rainfall on the windward side of the mountains. The rainfall decreases on the leeward side of the mountains, and this is why North Karnataka receives less rainfall than the coastal region.
The Western Ghats also play a role in regulating temperatures in the state. The mountains act as a natural barrier to the hot, dry winds from the north, and this helps to keep the temperatures in the state more moderate.
In conclusion, the Western Ghats mountain range plays a role in blocking monsoon rains from reaching North Karnataka, increasing rainfall along the coastal region, and regulating temperatures in the state.