Jessica is in labor with her first child. her contractions, which are about 5 minutes apart, are enabled by

Answer;

-Oxytocin

Oxytocin;

-Oxytocin is a hormone and a neurotransmitter that is involved in childbirth and breast-feeding. It is also associated with empathy, trust, sexual activity, and relationship-building.

-Oxytocin is a neurotransmitter and a hormone that is produced in the hypothalamus. From there, it is transported to and secreted by the pituitary gland, at the base of the brain. It plays a role in the female reproductive functions, from sexual activity to childbirth and breast feeding.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

amber has allowed scientists to study dna that has been preserved over millions of years.