Question

what disease does the sickle cell trait protect against?
abnormal blood clotting
abnormal bleeding
malaria
sickle cell disease
anemia

Explanation:

Sickle cell trait provides protection against malaria. This is because the abnormal red blood cells (sickle - shaped) in individuals with sickle cell trait make it difficult for the malaria parasite (Plasmodium) to complete its life cycle within the red blood cells. Malaria is a mosquito - borne infectious disease caused by Plasmodium parasites. Abnormal blood clotting is related to disorders like thrombophilia, abnormal bleeding is associated with conditions like hemophilia, sickle cell disease is a more severe form of the genetic condition related to sickle cell trait, and anemia is a general condition of low red blood cell or hemoglobin levels (sickle cell trait can cause a mild form of anemia but it doesn't protect against anemia in general).

Answer:

C. malaria