What must you do to visualize chest recoil when performing CPR on an infant?

To visualize chest recoil when performing CPR on an infant, it is essential to expose the infant's chest. This allows the rescuer to clearly see how the chest rises and falls with each compression and release cycle. Observing chest recoil is crucial because it indicates that the compressions are effective and that blood is being circulated through the child's body. Proper exposure ensures that there are no obstructions or clothing that could hinder this visual feedback.

The other options do not directly contribute to visualizing that critical aspect of CPR. Compressing the chest is necessary for performing the CPR itself, but it does not help in visualizing recoil if the chest is not exposed. Covering the chest or lifting the body may obstruct the view and not provide any additional benefit to observing the effectiveness of the compressions. Therefore, exposing the infant's chest is the key action to ensure proper technique and effectiveness during CPR.