Which of the following describes a training round?

A training round is specifically designed to provide a safe and effective means of practicing skills and techniques without the risk associated with live ammunition. As such, it contains no explosive components, making it safe to use in various training environments. This design allows personnel to engage in realistic training scenarios while eliminating the hazards that come with traditional live rounds, such as the risk of accidental detonation or injury.

The other options fail to accurately capture the essence of what a training round is. While training rounds can indeed be used for practice scenarios, and may be employed in exercises that simulate live fire to some extent, they are not equivalent to live rounds and certainly do not contain explosive materials. The focus of training rounds is on safety and skill development, rather than replicating the actual explosive capabilities of a live round.