Answer:
they dont know like hard words yet
Explanation:
During low exercise intensity levels you would still be able to sing. Correct answer: A Low-intensity exercise is exercise that gets you to about 40 to 50 percent of your MHR. Examples include a casual walk, a stretch session, a beginners' yoga class or tai chi... Low-intensity exercises can easily become moderate-intensity exercises by upping your pace. However while performing moderate activity you can talk, but you can't sing.
B.Mood-altering chemicals derived from plants.
please correct my answer if its wrong
Answer:
Your vascular system, your endocrine system, and your nervous system
Explanation:
