What is unique about the fish and chips offered this year?

The detail that only half orders of fish and chips are available this year introduces a significant change that highlights the restaurant's approach to portion control and possibly caters to customers who may prefer lighter meal options. This approach can enhance customer satisfaction by allowing for smaller servings, encouraging diners to enjoy the dish without overindulging or committing to a full-size portion. It reflects a trend in dining experiences, where flexibility and personal choice are prioritized, and demonstrates sensitivity to diverse customer preferences.

In contrast, the other choices suggest modifications or removals that would not contribute to an enhanced experience or accommodate differing appetites. A new sauce, deeper frying, or removal from the menu would not necessarily reflect the same intent to adjust offering sizes to benefit customers.