Plz help me on this question I have 3 minutes and

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

What is the difference in point of view and voice

Need plato answers asapselect all the correct answers.you are about to proofread your essay before turning it in. which of the following strategies should you use to maximize your effectiveness? 1. use only red pen for marking your mistakes.2. remember to look for mistakes you have made in the past.3. remember that, many times, teachers let small mistakes go.4. proofread backward, beginning from the end of the essay.5. look mostly at the introduction and conclusion.