Which type of change corresponds to complex modifications in the User Interface?

The choice of configuring screen-based logic is indeed the most fitting for the type of change that involves complex modifications in the User Interface (UI). This process entails adjusting the interactive behaviors and conditions that govern how users experience the interface. It can include implementing rules for when certain fields become visible or required, enhancing user experience by dynamically guiding users through the UI based on their inputs or prior selections.

In comparison, changing labels, modifying fields on a screen, and altering field order are relatively straightforward tasks. They typically involve basic adjustments that do not fundamentally alter the interaction design or flow of the user experience. For instance, changing labels might improve clarity but does not change how the system reacts to user inputs. Similarly, modifying fields and altering field order may help in organizing information better but do not introduce complex interactions or dependency considerations that screen-based logic entails. All these tasks are less intricate than implementing logic that creates a more responsive and adaptive UI tailored to user actions and scenarios.