In Pega, what does an 'activity' rule type accomplish?

An activity in Pega is designed to define a sequence of steps that are executed when the rule is called. This makes it a powerful tool for automating processes and implementing business logic. Activities can perform various actions, such as manipulating data, calling other rules, or executing specific operations within the application.

When an activity is invoked, it executes the defined steps in order, allowing developers to determine how workflows progress and what actions to perform based on certain conditions. This capability is crucial for defining the functional behavior of the application and ensuring consistent execution of business rules.

Other options describe different functionalities within Pega. For instance, the graphical representation of user interactions is associated with user interface designs, while handling external system integrations pertains to connectivity or service rules. Managing user access and permissions involves security features that are distinct from the execution of activities, highlighting the specialized purpose of each rule type in the Pega platform.