Final answer:
Poor diet is not a common cause of hypotension, while heart failure, shock, and acute blood loss are common causes.
Step-by-step explanation:
Among the options given, poor diet is not a common cause of hypotension. Hypotension refers to low blood pressure, and while poor diet can contribute to various health issues, it is not a direct cause of hypotension. Heart failure, shock, and acute blood loss are common causes of hypotension due to their impact on the cardiovascular system.