Anew species is discovered and scientists are trying to classify it. one of the key features found is that the species is entirely dependent on other organisms for its food necessary to sustain life. what type of species is this?

Parasitic

Explanation:

The species that is described is a parasitic species. The reason why it will fall into this category is that its key feature is that it is entirely dependent on other organisms for its food. This type of species are not able to produce food for themselves, nor are able to get it from the environment, which is way they have evolved in a manner to use the other organisms. They find a host organisms, attach to it, and then they are extracting the nutrients out of that organism, thus classical parasitism. The extraction of the nutrients can be so severe that the parasitic species can actually kill systemically its host.