Question

list any three features of permanent settlement. how did it lead to further exploitation of farmers ?

Answer 1

the permanent settlement was an agreementbetween the East India Company and Bengali landlords to fix revenues to be raised from land, with far-reaching consequences for both agricultural methods and productivity ...
its three features are...
The question of incentivisation now being understood to be central, the security of tenure of landlords was guaranteed. In short, the former landholders and revenue intermediaries were granted proprietorial rights (effective ownership) to the land they held.
the land tax was fixed in perpetuity to minimise the tendency by British administrators to amass a small fortune in sluiced-away revenue.
Smallholders were no longer permitted to sell their land, but they could not be expropriated by their new landlords.
Incentivization of zamindars was intended to encourage improvements of the land, such as drainage, irrigation and the construction of roads and bridges; such infrastructure had been insufficient through much of Bengal. With a fixed land tax, zamindars could securely invest in increasing their income without any fear of having the increase taxed away by the Company. Cornwallis made the motivation quite clear by declaring that "when the demand of government is fixed, an opportunity is afforded to the landholder of increasing his profits, by the improvement of his lands".These caused the exploitation of farmers