When transferring Mr. Stone to a wheelchair, what is a crucial action to ensure safety?

Locking the brakes on the wheelchair is a crucial action to ensure safety during the transfer of Mr. Stone. When the brakes are engaged, the wheelchair remains stationary, preventing it from rolling away as the person is being transferred. This stability is vital to secure both the aide and Mr. Stone, reducing the risk of accidents or falls during the transfer process.

During a transfer, it's important to maintain a steady and secure environment to support the individual being moved. If the wheelchair is not locked, even a slight movement can lead to serious injuries, making this step an essential part of the safety protocol.

The other options, while they may contribute to comfort or some support, do not address the primary concern of ensuring the wheelchair remains stable during the transfer.