What activity allows for executing actions repeatedly based on a true condition?

The activity that allows for executing actions repeatedly based on a true condition is the While activity. This activity continuously executes its enclosed actions as long as the specified condition evaluates to true. It provides a way to perform repetitive tasks until a certain condition changes, making it particularly useful in scenarios where the number of iterations is not known in advance and depends on the dynamic evaluation of the condition.

For example, if you are processing items until a certain item count is reached or until a specific status is met, the While activity would be appropriate to ensure that the tasks are repeated as required without predefined limits. This capability to handle conditions dynamically distinguishes the While activity from others that serve different purposes.

The If activity evaluates a condition and executes actions based on a single true or false outcome; it doesn’t repeat actions. The For Each activity is utilized for iterating over collections but doesn't inherently rely on a true/false condition for repetition. The Invoke Workflow activity executes a separate workflow once and does not repeat actions based on a condition. Therefore, the While activity is the correct choice for repeating actions based on an evaluative condition.