Which technique is NOT recommended to avoid kickback?

Holding the saw with one hand is not a recommended technique for avoiding kickback. Proper handling techniques are crucial for maintaining control over the chainsaw during operation. Using both hands provides balanced support, allowing the operator to maintain a firm grip, which is essential to effectively manage the saw's movement and reactions, particularly in the event of kickback.

In contrast, using a sharp chain is beneficial because sharp chains tend to cut more effectively and require less force, reducing the risk of kickback due to binding or loss of control. Avoiding cutting with the top half of the guide bar is also a crucial technique, as this area is more prone to causing kickback. Moreover, ensuring the power head is below shoulder level contributes to better ergonomics and control, helping to minimize the risk of sudden kicks or jolts.

Therefore, option B is correct because one-handed operation significantly increases the likelihood of losing control of the saw in the event of kickback, making it a riskier practice.