Observation of security responses to one or more attempts to gain unauthorized access is an example of an adversarial surveillance activity.

1. true
2. false:

True

Explanation:

Adversarial surveillance is done to obtain and collect the information from individuals, businesses, infrastructure in order to know whether any criminal activity is going on, or to check unauthorized access over the property and to detect the terrorism.

This is hidden kind of surveillance in this the person conducting surveillance remains undetected and conduct surveillance by conducting repeated repeats and clicking photos from cell phone camera.