Q.

Ozone layer in the outer atmosphere helps us in –

A. reflecting radio waves and makes radio communication possible
B. regulating he temperature of atmosphere
C. absorbing cosmic ray particles
D. absorbing U-V radiations
Answer» D. absorbing U-V radiations
Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03) which absorbs 97- 99% of the Sun's medium-frequency ultraviolet light.
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