Question

Only two markers of human activity are evident in the stratosphere.

They are indicated by _____ .

Select one:
a. the condition of the ozone layer and the presence of spy planes
b. the flight of rockets and transmission of radio signals
c. the weather that we experience and commercial airplane flight

d. the presence of satellites and the International Space Station

Answer 1

Answer:

Option A. the condition of the ozone layer and the presence of spy planes.

Explanation:

Stratosphere is very important layer because a very important gas i. e. Ozone is present. Ozone gas makes a layer around the earth which prevents the earth from harmful ultraviolet radiation of the sun. This radiation causes skin disease such as skin cancer. Aeroplane and jets also fly in this region.