Timelines usually include which feature?

A. how much something changes

B. where locations are in a relation to each other

C. illustrations of processes

D. specific dates for key events

D. specific dates for key events

D. specific dates for key events

The answer is D. specific dates for key events. Timelines are graphical representations that display a chronological sequence of events or activities. They typically include specific dates to indicate when important events occurred. The purpose of a timeline is to provide a visual representation of the order and timing of historical or sequential events. By using specific dates, timelines allow us to understand the sequence of events and their relationship to each other.