3. almost two-thirds of earth’s fresh water is located in the arctic ice sheet atlantic ocean antarctic ice sheet great lakes

The correct answer is - Antarctic Ice Sheet.

The Antarctic Ice Sheet is by far the largest ice mass on our planet. These ice sheet is estimated to have 26.5 million cubic kilometers of ice, and it covers an area of around 14 million square kilometers. In this ice sheet, almost two thirds of the Earth's freshwater is trapped, or more specifically, around 61% of all freshwater on the planet, and that is an equivalent of water that can raise the sea level for around 58 meters.

not completely sure but i think it’s many moons, smaller in size and a ring system.