The set of words that are examples of an order transition is:
Firstly, Following, Previously, Above all
These words signal a sequence or order in the information being presented.
The other options do not primarily indicate order transitions. For example, "Unlike," "Despite," "Whereas," and "Conversely" indicate contrast, while "Obviously," "Undoubtedly," "In particular," and "Never" serve different purposes, and "Furthermore," "Moreover," "Apart from this," "As well as" are more about adding information rather than ordering it.