which is an example of a response to a stimulus
A.loss of water from the body as a result of excess sweating
B.the thick fur on an animal to protect it from cold weather
C.an increasing heart rate when blood oxygen levels drop
D.the presence of allergens in the air
C. because stimuli is how your body responds to something, and in this case, someone's heart rate increases WHEN their blood oxygen drop. Do you see how it responds? ;-)
