Malaria is a diseases that affects animals, and humans. Malaria is causes by a parasitic. Which means the answer would have to be option D "a parasitic rickettsia." Malaria symptoms are: fever, tiredness, vomiting, and headaches. Malaria is a very common disease by a single cell micro organism.
<span>In a ecosystem,rocks are an example of an abiotic factor because they are not a living part of the environment. From context of the statement, an abiotic factor is the non-living part of the environment in a ecosystem.</span>
