Which of the following Scottish lakes is the deepest freshwater body of water in the British Isles?

Loch Morar is located in Lochaber, Highland. It is a freshwater Loch. River Meoble empties its waters into the loch. River Marar is the outflow of Loch Morar. The maximum length of the loch is 18.8 km (11.7 miles). It has a total surface area of 26.7 km2 (10.3 square miles), the fifth largest loch in Scotland. It is the deepest freshwater body in the British Isles with a maximum depth of 310 m (1,017 ft) and an average depth of 87 metres (284 ft).

Loch Morar was formed through glacial action that occurred around 10,000 years ago, and has a surface elevation of 9 metres (30 ft) above sea level. It is a habitat for fish such as minnow, eel, stickleback, sea trout, and Arctic Char.