The diaphragm is to the thoracic cavity and to the pelvic cavity.
inferior; superior
superior; anterior
posterior; inferior
superior; inferior

The correct answer for the fill in the blank is - inferior; superior.

Diphragm is a thin muscular and membranous sheet like structure that separates thoracic cavity ( chest cavity) from abdominal cavity. It is present below lungs and heart and therefore lies inferior to the thoracic cavity ( chest). It is a primary muscle involved in respiration.

As it separates chest from abdomen, therefore it lies superior or above the pelvic cavity ( present in the pelvic region that lies between abdomen and thighs).

Thus, diaphragm is inferior to the thoracic cavity and superior to the pelvic cavity.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

can you make it bigger i can't see it