Amongst the several types of viral hepatitis, it is hepatitis A that can spread through the fecal-oral route.
Usually, a person can acquire hepatitis A if he/she ingests contaminated food or water, further it can also spread through direct contact with the infected person.
due to its transmission through the fecal-oral route, lack of good sanitation practices and hygiene are the major causes for its spread.
Darwin describes natural selection as a process whereby nature selects those organisms that have favourable characteristics to be parents of the next generation. The individuals possessing the favourable traits are better suited to the prevailing environmental conditions. This enables them to stand a better chance to survive in the struggle for existence due to limited resources.
