Which event occurs each time an interval is elapsed in the timer?

The correct answer is A. Tick.

A tick is an event that occurs each time an interval is elapsed in the timer. It is a signal that the timer has reached a certain point in its cycle. The tick event can be used to trigger other events, such as updating a progress bar or playing a sound.

The other options are incorrect because:

• B. Click is an event that occurs when the user clicks on an element.
• C. Elapse is a verb that means to pass or go by.
• D. Count is a verb that means to determine the number of something.