I believe it’s a, good luck:)
Answer:
Labor contractions are the periodic tightening and relaxing of the uterine muscle, the largest muscle in a woman's body. Something triggers the pituitary gland to release a hormone called oxytocin that stimulates the uterine tightening.
I hope it's helpful!
Answer: Exotic disease
Explanation: Exotic disease is a term used to describe infectious disease which are currently absent in a particular country but present in some other countries in the world. An exotic disease could result either due to the fact that such disease has never surfaced in the country or it has been completely eradicated through through quarantine or any other eradication scheme.
For Instance, pseudorabies is an exotic disease in Denmark because it has been eradicated in the country, while it isn't in Ireland.