The suns energy reaches the earth by

a: conduction

b: convection

c: radiation

d: fusion

The answer is option C "radiation." When the sun gives off energy it travels and hits the Earth which what keeps the Earth cool, which is radiation. The Ozone layer helps the Earth by absorbing harmful heat ways that can be dangerous to the Earth and if we didn't have the Ozone layer the temperature would increase dramatically.

Hope this helps!

Nonportrit

i think it's c. i'm not sure but i think so.