the process of loking at the differences between two things or ideas with the use of appropriate transition signals

We use a variety of transition signals to fulfil a number of functions. Some of these functions include: to show the order or sequence of events; to indicate that a new idea or an example will follow; to show that a contrasting idea will be presented, or to signal a summary or a conclusion.

Ithink they do have the same properties just in less quantities i think