Answer :
Answer:
D. make some sentences shorter.
Explanation:
According to a different source, these are the options that come with this question:
A. Combine sentences 1 and 2.
B. Begin sentence with different parts of speech.
C. Invert sentence 3.
D. Make some sentences shorter.
Out of these options, the best way to add variety to this passage would be by making some sentences shorter. All the sentences included in this passage are long and contain a lot of information. Although this is not necessarily a problem, making sentences shorter will provide variety to the text. It will also allow the reader to better understand all the ideas expressed in the text.