When the stimuli in a task occur in highly predictable ways, an individual is often able to attend to both that task and another one at the same time. when this occurs, the processing of the first task is?

I believe the answer is automatic.

Automatic processing refers to the process/response that occur without direct intention from the doer.

This processing require almost no attention to be completed and would commonly be used in easy, predictable, or other activities that are included in our daily habit.