Correct Answer: Virus

Solution : The correct option is Virus.

The dengue virus is the organism that causes dengue disease. These viruses are members of the Flaviviridae family and are predominantly transmitted to humans by the bite of infected Aedes mosquitos, specifically Aedes aegypti and Aedes albopictus. Dengue fever is a major global health concern, especially in tropical and subtropical regions, and it can cause a variety of symptoms such as high fever, severe headache, joint and muscle pain, rash, and, in severe cases, dengue hemorrhagic fever or dengue shock syndrome, which can be fatal.