Q518
Some riven and canals have locks across them in order to
A.
Collect taxes
B.
Ensure safety
C.
Control the level of water
AnswerD.
Load or unload freight
Answer: Option C
Solution
Answer: Option C
Solution:
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.