Which best explains why a decrease in the types of insects in an ecosystem reduces the sustainability of the ecosystem? a=organisms that depend on insects may not survive, eventually harming all the organisms that are interconnected. b=the biodiversity of the ecosystem cannot be protected by laws unless there are a certain number of insect species. c=there will likely be fewer insects that harm plants, causing an increase in plant diversity. d=having fewer insects allows other organisms to use the resources that the insects were using.