Explanation:

It is the sixth largest continent: This statement is incorrect. Antarctica is the fifth largest continent, not the sixth. The continents, in order of size from largest to smallest, are Asia, Africa, North America, South America, Antarctica, Europe, and Australia.

Well-known animals that live in Antarctica include Polar Bears and seals: This statement is incorrect. Polar Bears are not native to Antarctica; they are typically found in the Arctic. Seals are indeed found in Antarctica, along with various other cold-adapted wildlife such as penguins.

The Antarctic ice sheet is the largest single mass of ice on Earth: This statement is correct. The Antarctic ice sheet is the largest single mass of ice on Earth, holding a vast amount of freshwater in the form of ice.