Why a labourer makes a cut on the tree in the side facing the direction in which he wants to fall?

A labourer makes a cut on the side of the tree facing the direction he wants it to fall to create a notch that guides the tree's fall. This cut removes material from that side, allowing gravity to pull the tree in the desired direction more easily. It also helps to control the direction of the fall and minimizes the risk of the tree splitting or falling unpredictably. Properly planning the cut ensures safety and efficiency during the felling process.