During a community health awareness program, a health worker is educating residents about preventing Dengue fever. Which of the following vector control measures should be emphasized as the most effective primary strategy against *Aedes aegypti* mosquitoes in urban settings?

Explanation

*Aedes aegypti*, the primary vector for Dengue and Chikungunya, is a day-biting mosquito that breeds predominantly in small collections of fresh water in and around human dwellings (e.g., water storage containers, discarded tires, flower pots, coolers). Therefore, larval source reduction and management (e.g., emptying and cleaning water containers, covering water storage, proper disposal of waste, use of larvicides) is the most effective primary vector control strategy for these diseases in urban settings. IRS and LLINs are primarily effective against *Anopheles* mosquitoes (malaria vectors), and MDA is for Lymphatic Filariasis.