What’s is the cart to this problem?
There is no absolute reason as to how they survive besides organisms learning to adapt. In order to live in a polluted environment the animals have to survive and learn to adapt.
I think the answer is non reactive. As the outer shells gets filled ,valency decreases, so reactivity also decreases.
All the best
<span> An example would be blowing out birthday candles, as most try to get rid of the flames of the candles in a single breath.
Hope this helps !
Photon</span>
D because it states that alternate version of genes could cause variations
