Answer: Kettle lake
A kettle lake is a glacier depositional feature. A kettle lake is formed when the retreating glacier removes the superficial blocks of ice. The chunks or blocks of ice are taken away by glacier along with sediments. The place where these blocks and chunks are left, creates a depression called as kettle due to weight of these chunks and blocks. The ice of these blocks melts and water is deposited in the depression, creates lake of water.
Therefore, kettle lake is a glacier depositional feature which is created when a ice is buried in a drift and eventually melts.