The largest part of our hydrosphere is

Atlantic Ocean
Indian Ocean
Pacific ocean
Antarctica ocean

The correct answer is C. Pacific Ocean.

The Pacific Ocean is the largest and deepest of the world’s oceans, covering approximately 46% of the Earth’s surface. It is bounded by the Eastern Pacific Rise to the east, the Andes Mountains to the west, the Arctic Ocean to the north, and the Southern Ocean to the south. The Pacific Ocean is home to a wide variety of marine life, including fish, mammals, and coral reefs. It is also a major source of food and economic activity for many countries around the world.

The Atlantic Ocean is the second largest ocean in the world, covering approximately 20% of the Earth’s surface. It is bounded by the Arctic Ocean to the north, the Americas to the west, Europe and Africa to the east, and the Southern Ocean to the south. The Atlantic Ocean is home to a wide variety of marine life, including fish, mammals, and coral reefs. It is also a major source of food and economic activity for many countries around the world.

The Indian Ocean is the third largest ocean in the world, covering approximately 20% of the Earth’s surface. It is bounded by Africa to the west, Asia to the north, Australia to the east, and the Southern Ocean to the south. The Indian Ocean is home to a wide variety of marine life, including fish, mammals, and coral reefs. It is also a major source of food and economic activity for many countries around the world.

Antarctica Ocean is the smallest of the world’s oceans, covering approximately 3% of the Earth’s surface. It is bounded by Antarctica to the south, the Atlantic Ocean to the west, the Indian Ocean to the east, and the Pacific Ocean to the north. The Antarctic Ocean is home to a wide variety of marine life, including fish, mammals, and penguins. It is also a major source of food and economic activity for many countries around the world.