Question

location where the diaphragm has a small opening through which the esophagus passes before connecting...
hilum
lacteals
hiatal

Explanation:

The esophagus passes through the diaphragm via the esophageal hiatus. The term "hiatal" is related to the hiatus. The hilum is an area in organs like the lungs or kidneys for vessels and ducts entry - exit, and lacteals are lymphatic vessels in the small intestine.

Answer:

Hiatal