16. Descriptive text helps the readers form images or visualize processes.
A for purpose,
B for language
C for key structure.

17. It uses descriptive details, words sush as in particular, for an instance and to illustrate.
A for purpose,
B for language
C for key structure

18. Sequence or time order presents ideas or events in the order in which they happen.
A for purpose,
B for language
C for key structure

19. It uses the time order such as first, next, last, another, then, finally, before, preceding following
A for purpose
B for language
C for key structure

20. The information or argument are sometimes constructed in a chain so that the writer can lay out steps in a process, series of events or hierarchy.
A for purpose,
B for language
C for key structure​