Which ecosystem of the following situations contributes to the sustainability of an ecosystem
A. Increases biodiversity
B. Decrease in bio diversity
C. Excision of a population from the ecosystem
D. Removal of many populations of an organism

A

Explanation:Human activities and natural disasters such as deforestation, tornadoes, floods, pollution, etc. The biodiversity of an ecosystem contributes to the sustainability of that ecosystem. Higher/more biodiversity = more sustainable. Lower/less biodiversity = less sustainable.

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.