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Answer:
Below
Explanation:
Here, ground-level or "bad" ozone is an air pollutant that is harmful to breathe and it damages crops, trees and other vegetation. It is a main ingredient of urban smog. The troposphere generally extends to a level about 6 miles up, where it meets the second layer, the stratosphere. The stratosphere or "good" ozone layer extends upward from about 6 to 30 miles and protects life on Earth from the sun's harmful ultraviolet (UV) rays.
A. Physical properties are used to describe matter.
Physical characteristics include color, shape, and mass, among other descriptors. Chemical properties describe how matter changes its chemical composition. Since chemical changes cause the matter to have a different identity, the physical properties describe the type of matter.
<u>Answer:</u>
The reason that east Africa was located on two water bodies, namely the Indian ocean and the red sea resulted this region to become a major international trade center.
These two water bodies were the major trade routes for the countries in east Africa. The major export of east Africa to other countries of the world were tea, cut flowers, fish and some vegetables also. It was also known for exporting tobacco.