I'll give you a question, please answer with step-by-step reasoning process.
The depletion of what results in higher levels of uv radiation reaching earth?\nOptions:\n- (A) O3\n- (B) O2\n- (C) oil\n- (D) pan\n- (E) h2o\n- (F) CO2\n- (G) DNA\n- (H) DDT

(A)
Ozone depletion results in higher levels of UV radiation reaching Earth.

Ozone is represented chemically as O3.

O3 depletion results in higher levels of UV radiation reaching Earth.

.

Thus, the answer is (A)