What instrument would you use to tell the time?

Explanation

A clock is an instrument used to indicate, keep, and co-ordinate time. All clocks are made up of a whole set of different pieces, each with their own function and task to ultimately ensure the clock works. The energy needed to operate the clock can come from a battery or a spring. Before Man invented methods to measure the time in seconds, minutes and hours, nature had already created natural time intervals for us such as days, months and years.