Which control can be used to invoke an action?

The button control is specifically designed to invoke actions within a user interface. When a user clicks a button, it triggers certain predefined behaviors, such as submitting a form, executing a process, or navigating to another part of an application. This makes buttons essential for interactive applications, allowing users to engage with the system effectively and providing an intuitive way to perform tasks.

In contrast, while other controls like text fields, labels, and dropdowns serve important roles within the user interface, they do not inherently invoke actions by themselves. Text fields are primarily for user input, labels display static information or instructions, and dropdown controls allow users to select from predefined options. However, these controls do not normally initiate actions until they are used in conjunction with a button or another action-triggering element. Thus, the button control stands out as the appropriate choice for invoking actions in a Pega application.