Explain how humans rely on the biodiversity of an ecosystem to provide necessary resources, and give an example. (Ik I did a lot of q’s tonight but I have this assignment to do and it’s really late but I need to turn it in )

Ecosystem services are the benefits that people obtain from ecosystems. ... From the availability of adequate food and water to disease regulation of vectors, pests, and pathogens, human health and well-being depend on these services and conditions from the natural environment.

Explanation:

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.