The earth has more sea than land.

Explanation:
The earth is predominantly covered by water bodies, making the sea the largest feature on our planet. Here's a breakdown of the reasons why the correct answer is option 'D', and why the sea exceeds the land on Earth:

1. Earth's Surface Composition:
- The earth is made up of about 71% water and 29% land.
- The water bodies, such as the oceans, seas, lakes, and rivers, collectively cover a significantly larger area compared to the landmasses.

2. Oceans and Seas:
- The oceans are vast bodies of saltwater that cover approximately 71% of the earth's surface.
- The five major oceans are the Atlantic Ocean, Pacific Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean.
- These oceans are connected and form a continuous body of water, surrounding the landmasses.
- Additionally, there are numerous seas that are interconnected with the oceans, further contributing to the larger water area.

3. Landmasses:
- The landmasses on earth consist of continents and islands.
- There are seven major continents: Africa, Antarctica, Asia, Europe, North America, Australia, and South America.
- These continents make up the land part of the earth's surface.
- However, even though the landmasses are substantial, they account for only about 29% of the earth's surface area.

Conclusion:
Considering the vastness of the oceans, seas, lakes, and rivers that cover about 71% of the earth's surface, it is evident that the earth has more sea than land. The vastness of the sea is a crucial characteristic of our planet, shaping its climate, weather patterns, and supporting an incredibly diverse range of marine life.