Answer:
A natural disaster that affects a small number of organisms.
Step-by-step explanation:
A natural disaster that affects a small number of organisms since a natural disaster is a sudden and unpredictable for the most part. Due to this, animals don't have time to adapt and this will not affect the evolution process of those species since they are likely to die within a short period of time after the calamity occurs. They will not have enough time to save their own lives so can you expect them to evolve and grow wings to fly away?
Well you see here, you need to take attest pre-calculus to answer this question. I am in 6th grade.
Answer: A
And the answer is literally on top of that question