Photoplethysmography is used to track of heart rate during a workout
Answer:
By avoiding contact with the blood of others
Explanation:
<h2>Answer:</h2><h3>Intuition – An innate belief about something without conscious consideration.</h3>
<em>hope</em><em> </em><em>I</em><em> </em><em>help</em><em>!</em>
I believe the answer is A
