A Kingdom. There's an animal and a plant Kingdom.
Answer:
Decrease in genetic diversity reduces the chance of variation in the offspring.
Explanation:
If there is no variation, there will be no evolution. So, if there is a change in the environment (like an outbreak of a disease) that affects one of the organisms, it is likely to affect all of them and destroy the whole population. This would lead to extinction.
Simple! Air, Water, Food, and Shelter!
The answer is two alleles, so B.
It is dependent on the availability of nutrients. Hope this helped:)