How does the absorption of ultraviolet radiation by the ozone layer sustain life?

This process helps maintain the temperature of the Earth.
It keeps a low level of harmful ultraviolet radiation from reaching living organisms.
This process keeps ozone concentrations in the troposphere at lower levels.

(all of the above are true)
 
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The answer is c water is the solvent and salt is the solvent

Droughts cause very arid places such as a desert