Final answer:
The difference between robbery and extortion lies in the method of taking property; robbery involves force or intimidation to directly take property, whereas extortion uses threats of future harm or coercion, not the element of consent.
Step-by-step explanation:
The statement that the key difference between robbery and extortion is the element of consent is False. Both crimes involve the illegal taking of someone else's property, but they differ primarily in the method by which the property is taken. In the case of robbery, the perpetrator uses force or intimidation to take property directly from the victim. Extortion, by contrast, involves the perpetrator obtaining property through threats of future harm or coercion. The perpetrator of extortion does not necessarily take items directly from the victim, and consent is not a defining feature distinguishing the two crimes.