What functionality does On Parameters Change provide in a Block?

On Parameters Change is a key feature in OutSystems that enables a Block to react to changes in the input parameters received from the parent screen. This functionality is particularly useful for developers working with modular components, as it allows Blocks to maintain a dynamic and responsive behavior based on user interactions or changes in data passed from the parent context.

When an input parameter changes, the On Parameters Change functionality can be triggered to execute specific logic within the Block, such as updating displayed information, fetching data based on the new parameter values, or altering the state of the user interface. This capability allows for a seamless user experience, as the Block can autonomously adapt whenever the input parameters it relies on are modified.

While other answer choices refer to important aspects of Block functionality, such as event handling, managing data, or initializing values, they do not directly address the purpose and operation of reacting to parameter changes, which is central to effective component interaction in OutSystems.