Explanation:

- Lake Baikal is indeed the world's largest freshwater lake by volume and the world's deepest, with a maximum depth of 1,620 meters (5,315 feet).

- Option 1: Russia - Lake Baikal is located in southern Siberia, Russia. It is known for its unique biodiversity and status as a UNESCO World Heritage Site.

- Option 2: Tanzania - While Tanzania houses large lakes like Lake Victoria (largest by area in Africa), Lake Baikal is not found here.

- Option 3: Canada - Canada is home to many significant lakes, including the Great Lakes, but Lake Baikal is not in Canada.

- Option 4: Uganda - Uganda is near Lake Victoria but does not host Lake Baikal.

Correct Answer: Option 1: Russia