Answer: Possibly increase the production of socks
Explanation: As it implies, the mosquitoes that have sickness land on socks more often. Based on this information, since we know that malaria comes from mosquitoes, we can increase the production of socks, as that will separate most of the infected mosquitoes with the other mosquitoes, as most of the infected ones will fly over to the sock. With this scenario, we can bait the mosquitoes and know which ones are infected
