The answer is vigorous because your body needs the oxygen to continue to move your muscles during exercise. talking while in vigorous movement inhibits your oxygen intake which is why physiologicly, u can only say short words or sentences during exercise.
Answer:
Medicines that are unprescribed can be more dangerous as you cannot control the dosage and they have not been evaluated or examined by the FDA, they are also usually more addictive and damaging to one's wellbeing.
Explanation: big brain boi
C for which part of respiratory.....
B for the second pic
I think b but im not sure for the third picture
