Question

What life sustaining unit contains only one percent of the earth's mass?

Options

• biosphere

• lithosphere

• crust

• mantle

Answer 1

biosphere

Explanation:

The biosphere is the life-sustaining unit of the Earth, which includes all living organisms and their interactions with the environment. Despite its vital role in supporting life, the biosphere only accounts for about 1% of the Earth's total mass. This is because it consists of all living things and the thin layer of the Earth's surface where life exists, compared to the much larger non-living parts of the planet, like the mantle and core.