The correct answer is: C. 1800 kg
Brick earth is a type of soil that is used to make bricks. It is a mixture of sand, clay, and other materials. The weight of 1 m3 of brick earth varies depending on the specific composition of the earth. However, a typical value is 1800 kg.
Option A: 1200 kg is too low. This is the weight of 1 m3 of dry sand. Brick earth is heavier than dry sand because it contains clay.
Option B: 1500 kg is too high. This is the weight of 1 m3 of wet sand. Brick earth is not as wet as wet sand, so it
is not as heavy.Option D: 2000 kg is too high. This is the weight of 1 m3 of concrete. Concrete is much heavier than brick earth because it contains cement.