Question

which disease may be caused by an unhealthy lifestyle?
osteoporosis
sickle cell disease
huntingtons disease
lupus

Explanation:

Osteoporosis can be caused by factors like lack of calcium - rich diet, insufficient physical activity and excessive alcohol or tobacco use which are related to lifestyle. Sickle - cell disease, Huntington's disease are genetic disorders. Lupus is an autoimmune disease often influenced by genetic and environmental factors but not directly by lifestyle in the same way as osteoporosis.

Answer:

osteoporosis