True or false: surveillance can be performed through either stationary or mobile means.

This is true. Surveillance can be performed efficiently through both stationary and mobile means. As far as human surveillance goes, people can track other people by tailing them or by using a stationary means such as a stake out. As far as technology goes, there are plenty of mobile devices that can be used for surveillance such as tracking devices. Security cameras can be used for stationary purposes.

They both have rock surfaces