Question 5 (1 point)
Researchers have learned that the Ozone layer over Antarctica is getting thinner.
What is the ozone?

A. gas in atmosphere that absorbs harmful ultraviolet radiation

B. a thick slab of ice that is attached to a coastline but floats on the ocean

C. the process of ice breaking free from an ice shelf or glacier

D. strong, fast winds driven by the force of Earth's gravity​