Question

heartburn is caused by ______ .
a the hearts temperature rising
b swallowing of hot food
c acidic contents of the stomach escaping into the esophagus

Explanation:

Heartburn is a digestive issue unrelated to the heart. It occurs when the lower esophageal sphincter relaxes abnormally, allowing stomach acid to flow back into the esophagus, causing irritation.

Answer:

C. acidic contents of the stomach escaping into the esophagus