Define the words intervene , dictate and put them into a sentence

This device blocks an opening along the base/floor of stairs or other walking or working surfaces where materials or body parts might otherwise inadvertently fall through. it should be 4 inches high, with not more than ¼ inch clearance above the floor

Which of the following best explains why the author chose the compare-and-contrast structure for paragraph 2

Besides the revisions listed in the paragraph, what else can deepak do to strengthen his paper?