Skeletal and smooth muscles move when nerve impulses, sent from the , stimulate the muscle fibers, telling them to either contract or relax.

Ibelieve the answer is d.

Breastfeeding should last for 12 months.

Personality is a mixture of characteristics/qualities that form an individual's distinctive persona. it can be influenced by environmental and biological factors; one's culture is a most important factor that shape personality. extreme mood swings, unstable relationships, distorted self-image, impulsive/risky behavior, explosive anger, chronic feelings of sadness/emptiness, etc. these could indicate that someone could have a personality disorder.