Final answer:
Crushing a phrenic nerve would result in paralysis of the nerve, leading to difficulty or inability to breathe.
Step-by-step explanation:
Crushing a phrenic nerve would result in paralysis of the nerve. The phrenic nerve is responsible for controlling the movement of the diaphragm, which is essential for breathing. When the phrenic nerve is crushed or damaged, it can interrupt the transmission of nerve signals between the brain and the diaphragm, leading to paralysis of the diaphragm. This can result in difficulty or inability to breathe.