Concept:Aliya’s illness is described through her long-term medical history and the treatment she uses.Explanation:The novel states that Aliya has been asthmatic since childhood.She uses inhalers to control or stop asthmatic attacks.This shows that her condition is a chronic respiratory problem, not a blood disorder or liver infection.Leukemia, sickle cell anaemia, and hepatitis do not match the description given.Therefore, the illness she suffers from is asthma.Answer:A. Asthma