1. five months _interested in walking

2. six to nine months

_mini pushup and possibly rock on the stomach while kicking with the legs and "swimming" with the arms

3. twelve to fifteen months

_crawling

Nina has the flu and a high fever. her immune system is exhibiting the line of defense. this defense is part of immunity.

Are needed by the body in large amounts in order to maintain good health

What a self improvement for a busy person who had difficulty finding time to exercise/ dropping out of clubs and activities/ refusing social invitations from friends/ scheduling daily invitation activity/ sleeping fewer hours at night