Answer : 2. "Aedes mosquitoes"
Explanation :

The High Court of Karnataka took suo motu cognizance of the dengue rise across the state. Dengue, a mosquito-borne viral infection common in tropical and subtropical areas, is spread by Aedes mosquitoes. While many infections are mild, severe cases can cause dengue hemorrhagic fever, leading to rapid breathing, vomiting, and bleeding gums. With 400 million infections annually, treatment focuses on supportive care, as no specific medicine exists.