follows a sequence
Writing that is in chronological order tells things in the order in which they occur. Common key words and transition words for writing in chronological order are first, next, last, lastly, then, after, and before.
Writing that presents a problem takes on the problem-solution structure. Cause and effect takes on a first this happened and then these are all the things happened because of it structure. In cause and effect there can be many things happening at the same time because of the cause.