Question

The percentage of oxygen in the air does not change because

Oxygen is not used in any natural process
Oxygen used up in some natural process is renewed by another natural process
Oxygen used up in some natural process is replenished by the ozone layer
Oxygen used up in natural process Is negligible

plz plz give the answer correct

Answer 1

Answer:

Oxygen used up in some natural process is renewed by another natural process.

Explanation:

Example: Respiration and Photosynthesis

Answer 2

Answer:

B

Explanation:

Oxygen used up in natural process is renewed by another natural process

like

we take oxygen and give carbon dioxide, then plants take carbon dioxide and give oxygen...

so, the oxygen which was taken by us is given back by plants...

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