ANS:A - and plotting proceed simultaneously

While surveying a plot of land by plane tabling, the field observations and plotting proceed simultaneously. In plane tabling, the surveyor sets up the plane table at different stations across the area to be surveyed. From each station, the surveyor observes the surrounding features, takes measurements, and plots them directly onto the paper attached to the plane table. This method allows for real-time plotting of observations, making it possible to visualize and adjust the surveying process as it progresses.