Question

___ is a condition in which a mixture of digested food and acid moves from the stomach to the lower esophagus, resulting in heartburn. anemia constipation amenorrhea acid reflux disorder

Explanation:

Anemia is a blood - related condition (low red blood cells). Constipation is difficulty in passing stools. Amenorrhea is the absence of menstruation. Acid reflux disorder (gastro - esophageal reflux disease) is when stomach contents (digested food and acid) flow back into the esophagus, causing heartburn.

Answer:

Acid reflux disorder