It all depends on what kind of lock. It could be a lock in a
canal, a door lock, an ignition lock on a vehicle, a lock of hair,
a padlock, or any of many kinds of locks.
Can a lock be found on a canal?
There are no locks in the Suez Canal as it connects two bodies
of water that are at the same level
Why was sit necessary to build the locks in the canal?
Locks are necessary to lift barges and canal narrow boats up or
down through a series of lock gates. The water level at the start
of a series of lock gates may be higher or lower than the water
level at the other end of the lock gates. Without the retaining
effect of lock gates, the canal would simply be dry in some lengths
and wet in others.