Final answer:
The correct response is to hold the tube feeding and notify the physician due to the potential risks associated with high residual volumes such as aspiration or discomfort.
Step-by-step explanation:
In response to the question regarding a patient receiving 70 mL of tube feeding per hour and having a residual amount of 120 mL, the appropriate action would be to hold the feeding, and notify the physician. A high residual volume can indicate that the patient's stomach is not emptying properly which could lead to potential complications like aspiration or discomfort. Therefore, option d is the safest and most appropriate action to take in this situation.