An animal that transmits a disease from infected person or its stools etc. to other potential host is called
vector
The correct answer is Option D
Explanation of correct option:
Infections spread by infected arthropod species such as mosquitoes, ticks, triatomine bugs, sandflies, and black flies are known as vector-borne illnesses.
Explanation of incorrect options:
Option A:
The definitive or primary host is the creature in which the parasite matures and, if feasible, reproduces sexually.
Option B:
A secondary or intermediate host is an organism that houses a sexually immature parasite and is required by it to develop and complete the parasite's life cycle. It frequently works as a parasite's vector, allowing the infection to reach its final host.
Option C:
A parasite is an organism that lives on or in another creature and feeds on or at the cost of that organism.
Final answer: An animal that transmits a disease from an infected person or its stools etc. to another potential host are called vectors