A.Hypothesis
(It's basically an educated guess$
Fiction is made up, usually in a narrative form, and non-fiction is based on real events.
To identify the role of carbon dioxide production, breathing rate, and heart rate in determining the rate of cellular respiration<span>. </span>Cellular respiration<span> is a chemical reaction that occurs in your cells to create energy; when you are </span>exercising<span> your muscle cells are creating ATP to contract.</span>
Answer:
it would be the top right one
