One disadvantage of nuclear power is that the waste produced is dangerous. the waste is dangerous because it is what?

1. Biodiversity = the variance of plant and animal species within an environment 
With biology words, the best way to figure out the definition is to break it up into smaller words. In biodiversity, there is "bio" and "diversity". Bio means life and another word for diversity is variety. Therefore, in biodiversity, there is a variety of life or life forms. This answer choice best suits that definition. 

The reason the waste of nuclear power plants is so dangerous is it's radioactive, and in some cases, still nuclear.