Final answer:
Passive resistance is the hardest to identify due to the discrepancy between verbal agreement and actual behavior, making it challenging to detect without close observation.
Step-by-step explanation:
The type of resistance that is most difficult to identify because of false impressions of support and agreement is passive resistance. Passive resistance occurs when individuals do not openly express their opposition, but they also do not follow through with actions to support change or directives. They may agree verbally yet fail to act or subtly sabotage the process. This form of resistance is challenging to pinpoint since it requires close observation of behavior patterns rather than reliance on spoken assurances.