Explanation:
Keystone species are animals that help manage other animal species by controlling population numbers and biodiversity within an ecosystem. The impacts of keystone species are usually greater than their numbers.
owls can be a great benefit to places where rodent populations are high. Dense urban areas often suffer from an abundance of rats and mice spreading disease, and rural agricultural communities have their crops consumed and soil eroded from burrowing voles and field mice. Without owls, and other top predators, rodent populations could explode and exacerbate the effects they produce.
Answer:
A
Phosphate Group, Nitrogen Base, Deoxyribose (DNA)
The reason why research and development is an integral part of the designing and producing process of an aerospace product is that the aerospace industry is constantly pushing the limits of technology. Hope this answers your question.