Correct Option
The correct option isLakes
Explanation
Glaciers act as powerful agents of erosion, modifying the landscape through processes such as plucking and abrasion. As they move, they erode the underlying rock, creating distinct landforms.
Option Analysis
- Lakes: Correct. Glaciers carve out deep hollows or depressions (such as cirques) in mountainous regions. When the ice melts or the glacier retreats, these hollows fill with meltwater and precipitation, forming glacial lakes. In the context of cirques, these are specifically known as tarns.
- Craters: Incorrect. Craters are typically bowl-shaped depressions formed by volcanic activity (at the vent) or by the impact of meteorites. They are not formed by glacial erosion.
- Moraines: Incorrect. Moraines are depositional features, not erosional hollows. They consist of long ridges of deposits (till) left behind by a moving glacier.
- Deltas: Incorrect. Deltas are depositional landforms formed at the mouth of a river where it enters a slower-moving body of water (like an ocean or lake), leading to sediment deposition.
Key Takeaway
Glacial erosion creates deep depressions (hollows) in the landscape; when these depressions fill with meltwater, they become glacial lakes.