Final answer:
Florence Nightingale made important contributions to public health, including caring for the sick, improving environmental conditions, and founding the district nursing association.
Step-by-step explanation:
Florence Nightingale made significant contributions to public health. She cared for the sick, poor, and neglected both in institutions and at home. Additionally, Nightingale used a population-based approach to improve environmental conditions, which helped in preventing diseases. Another important contribution was her founding of the district nursing association to provide healthcare to those in need.