Edge species view available hint(s) edge species are all nest parasites exist only in areas that have been altered by humans require the unique homogenous edge environment decrease biodiversity may require conditions found in both of the borde

I think Edge species may require conditions that are found in both the bordering ecosystems. These are organisms that are evolutionarily distinct and endangered globally, they are considered to be one of a kind are nearing extinction, therefore, scientists are trying to preserve them using projects that will aid conservation efforts. 

The answer is D. An anion is a negatively charged ion, which means it has accepted an extra electron (s) from a donor ion (cation). To add an electron, energy has to be released so that the electron can be less excited and go back to its orbital level. The released energy is equivalent to the energy required to remove the electron from its orbital level.