What layer of earth's atmosphere above 10 kilometers has the most aerosol backscatter?

Troposphere.

Explanation:

The layer of the atmosphere is divided into five layers.

The layer of the atmosphere that extends up to 10 kilometers is the troposphere. The troposphere is close to the earth's surface which consists of water vapor and aerosol backscatter. It consists of the air needs for breathing and photosynthesis.

Therefore, the correct answer is the troposphere.

answer(c) carved on a babylonian clay tablet that showed earth as a flat circular disk;