Answer:
This question has little context, but I understand what you are trying to say.
The reason why dark moths survived while light moths weren't able to survive is due to the dark moths having conditions that allowed them to camouflage better than the light moths. An environmental condition that would allow this would be the dark moths and the light moths living in the same dark environment.
Explanation:
The number of organsims at each levels, so there are more producer than herbivores, more herbivores than carnivores and so on...
Answer: some moons are farther away and harder to spot
Explanation: