The central and most important part of an object, movement, or group, forming the basis for its activity and growth.
B. Reaction to life. At some point, everybody gets anxiety in their life. Sorry if it's wrong, I don't really know. I'm just going off experience
Answer:
7.helpful 9.They always have warning labels
Explanation:
7.They were stopping the bad habits and bringing new ones.
9.They never forget.
The answer is A. When the baby yawns, the baby is not experiencing stress.