Edwin Chadwick was the man that studied the relationships between poverty and disease in England and proposed a 'sanitary idea' to control disease.
<h3>Who was
Edwin Chadwick?</h3>
He was an English social reformer who is noted for his leadership in reforming the Poor Laws in England and instituting major reforms in urban sanitation and public health.
He was famous for having devised the legislation that dragged British sanitary science out of the dark ages and into the light of modern times.
In England, he was able to improve public health as he concluded that three main things were needed to improve health: refuse removal , an effective sewage system and clean running water in every house and a qualified medical officer appointed in each area.
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The answer you are looking for is Industry
Answer: vassals.
Explanation: A king (or lord) ruled large areas of land. To protect his land from invasion, the king gave parts of it to local lords, who were called vassals.
