Question

What is surveillance? explain.

Answer 1

it means close observation, especially for a suspected

hope it helps you

Answer 2

Surveillance is a French word.
it means..

Surveillance--- Watching over
Sur - From above
veiller - To watch

Definition-

Conducting close observations of an individual or a group.

Or Monitoring the behaviour, activities, or other changing information, usually of people for the purpose of influencing, Directing or Protecting them.