Which of the following work is the responsibility of a 'Patwari'?

A Patwari (also called Lekhpal) is a village-level revenue officer whose primary responsibility is measuring land and maintaining land records, including ownership details, land use, and revenue collection. This is essential for land administration and resolution of property matters. The other functions listed belong to other officials or panchayat bodies. Construction of common property is handled by the Panchayat, employment schemes by block officials, and dispute prevention through investigation is a broader administrative function.