What could be a consequence of failing to repair a leak in a refrigeration system?

Failing to repair a leak in a refrigeration system can lead to increased operational costs and environmental harm, which makes this choice correct. When a leak occurs, refrigerants escape the system, leading to a loss of efficiency. This inefficiency can result in higher energy consumption as the system works harder to maintain the desired temperature, thus increasing operational costs.

Additionally, many refrigerants are harmful to the environment, particularly those that contribute to ozone depletion or have high global warming potential. Allowing these substances to leak into the atmosphere can have serious ecological impacts, leading to stricter regulations and potential penalties for violations.

In contrast, enhanced system performance, no significant consequences, and improved refrigerant flow are unlikely outcomes when a leak is present. Instead of improving performance, a leak typically results in decreased efficiency and may lead to system failures if not addressed.