Multiple choice

A ___ is a section of waterway, closed off by gates, that allows ships to be raised or lowered.

  1. dam

  2. elevator

  3. canal

  4. lock

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A lock is a device used in canals and waterways with varying water levels to raise and lower ships between different water heights. Gates close to trap water, which is then pumped in or drained out.