Some riven and canals have locks across them in order to

A. Collect taxes

B. Ensure safety

C. Control the level of water

D. Load or unload freight

Answer: Option C

Solution(By Examveda Team)

Some rivers and canals have locks across them in order to Control the level of water. A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways.