Question

the cavity surrounded by a box is? pleural cavity pericardial cavity mediastynum abdominal cavity

Explanation:

The abdominal cavity is the largest cavity in the body and contains many vital organs such as the liver, stomach, and intestines. It is located below the thoracic cavity and is separated from it by the diaphragm. The pleural cavity surrounds the lungs, the pericardial cavity surrounds the heart, and the mediastinum is the central compartment of the thoracic cavity containing the heart, great vessels, trachea, etc. Based on the general anatomical location and the organs typically found in the cavity shown in the image - like the liver - it is likely the abdominal cavity.

Answer:

Abdominal Cavity