Which component of a multiple leaf spring keeps the springs from separating on the rebound after the spring has been depressed?

The correct choice is the leaf clip. This component is essential in a multiple leaf spring assembly as it serves to hold the individual leaves together, preventing them from separating or spreading apart when the spring is compressed and subsequently rebounds. When the vehicle or equipment experiences a load, the leaves flex and compress. The leaf clip provides critical support to maintain the alignment and integrity of the springs during this process, ensuring a smooth and controlled return to their original position.

The other options do not serve this specific purpose. A spring retainer is typically focused on holding the spring in a specific location rather than preventing separation. A spring spreader, as the name implies, would generally be involved in maintaining the spacing between the leaves in a different context, and a spring seat relates to where the spring mounts or rests, not directly to keeping the leaves together during compression and rebound. Therefore, the leaf clip is the vital component that performs the necessary function of maintaining the cohesion of the spring leaves during operation.