Final answer:
Malaria is a parasitic disease caused by Plasmodium protozoa and transmitted by infected mosquitoes. Symptoms include fever, joint pain, anemia, and fatigue.
Step-by-step explanation:
Malaria is a parasitic disease caused by the Plasmodium protozoa. It is transmitted to humans through the bite of an infected female Anopheles mosquito. The basic symptoms of malaria include fever, joint pain, anemia, and fatigue. The disease is prevalent in tropical and subtropical regions of the world.