Hi,
I think that you're missing some options, but here they are (let me know if I'm right!
-A population of wolves was introduced
-The amount of disease in the deer population decreased
-More grass was planted
Now, if the gene diversity decreased, it means that a lot of deer died. This could happen because wolves were introduced -this is the correct answer, and the wolves ate some deer.
Respiration occurs in living organisms around the world, including plants and animals. It encompasses the process<span> of breaking down organic molecules with </span>carbon<span> into smaller components, including </span>carbon dioxide<span>, which in turn releases into the </span>atmosphere<span> and surrounding environments.</span>