Which of the following best describes the technique for chest compressions?

Using two hands and interlocking fingers is the most effective technique for chest compressions during cardiopulmonary resuscitation (CPR). This approach ensures that sufficient force is applied to the chest, allowing for effective blood circulation. Interlocking the fingers helps to maintain a stable and strong position, which is crucial for generating the necessary depth and rate of compressions.

The standard guidelines recommend using both hands for adults and larger children to reach the appropriate compression depth, generally around two inches. This technique also allows for better leverage and minimizes the risk of injury to the rescuer's hands or wrists.

While other methods like using one hand may be suitable for small children or infants, they do not provide the necessary force for larger adults. Emphasizing speed in compressions, as mentioned in another option, is important, but it should not overshadow the need for adequate depth and full chest recoil. Alternating between breaths and compressions is essential for CPR but is more about the sequence than the technique of the compressions themselves. Therefore, the best practice is the interlocking of fingers with two hands to ensure effective compressions.