Answer:
The correct answer is - option B. There would be more grass for the surviving rabbits
Explanation:
As we know and given that the rabbits are the important grazers that help in maintaining the grassland habitats. If there would be no catastrophe to lower the population of the rabbit population then there will be overgrazing and there would be no grass for the rabbits.
But as it is given that there is a catastrophe that was to reduce the rabbit population then there will be a limited number of rabbits so there will be no overgrazing and there will be enough grass for the surviving rabbits.
The option that will occur if a catastrophe were to reduce rabbit population numbers will be D. All of the above.
A niche simply means the role that's played by an organism in the community.
It should be noted that in a situation where there's a reduction in the rabbit population, there would be more grass for the surviving rabbits
Also, since there are lesser rabbits, the grassland would be invaded by trees and shrubs.
In conclusion, the correct option is All of the above.
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