The answer is B bipolar disorders
Answer:
B, becoming independent
Explanation:
you become more independent as you get older
13: saliva (option B)
14: Tongue
15: esophagus
16: stomach
17: enzymes
18: chyme
19: small intestine
The answer is B.. If u can not talk while exercising it it too intense..you need to be able to do simple things while exercising..