Answer :
Tapeworm is a parasitic infectious agent. Thus, the correct option is D.
What are Infectious agents?
Infectious agents may be defined as those organisms that are competent in synthesizing infection or infectious disease in living entities. Examples of some infectious agents are bacteria, viruses, parasites, fungi, etc.
Tapeworm in humans is a parasitic-host relationship in which tapeworms are parasites and a human is a host. It is caused by the tapeworm species known as Taeniasis.
Therefore, the tapeworm is a parasitic infectious agent. Thus, the correct option is D.
To learn more about Parasites, refer to the link:
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