I believe the answer is: They supervised the work of the serfs
Sefs refers to the peasants that live during the European Feudalism era. Serfs worked in a territory owned by lords in exchange for small share and protection from the lord's knights. The one who supervise the work of the serfs were a collection of people trusted by the Lords, not the Clergy.
Norwich and Plymouth
[I think]
The dissolution of the Burgundian Netherlands in 1477 led to a realignment in the European geopolitical landscape. The Burgundian Netherlands were imperial and french chiefs ruled in personal in the period 1384 to 1482 by the house of Valois-Burgundy and their Habsburg heirs.
The improvement in agriculture create more agricultural products in larger quantity. This means that the countryside now had the chance to sell the agricultural products to the townspeople. So, we can say that improvement in agriculture affects townspeople by providing them with additional amount of food supply