Answer:
They build up their theory on wealth being derived solely from the value of agriculture.
Step-by-step explanation:
The physiocrats were referred to as economists who were mainly French who believed in physiocracy around the Eighteenth century.
Their beliefs and theory were based on how wealth is derived. They believed that wealth was derived solely from the values obtainable as a result of Agricultural activities and land resources. They also referred to land as the sole source of wealth in the world.