Which of the following is not a potential health effect of radiation?
a. thyroid disorders and cancers
b. brain damage to the unborn
c. genetic disorders
d. pneumonia

The best answer is D

Pneumonia is an infection caused by fungi, bacteria and  viruses. It is not caused by radiation.

Pneumonia causes inflammation of the air sacs called alveoli, in the lungs. Once inflamed, the alveoli fill with fluid and/or pus making the process of breathing difficult.

bacterial pneumonia is caused by a bacteria called Streptococcus pneumonia.

A type of fungi called mycoplasma causes mycoplasma pneumonia

The flu virus has been implicated in also causing viral pneumonia, usually in children.

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.