Question

multiple - choice question
what are levees?
industrial boat docks for large ships
a system of moats, ditches and diversion channels
something built up, such as walls, use to prevent the overflow of water from a river or lake

Explanation:

Levees are structures like walls built to prevent water from a river or lake from overflowing. They are not industrial boat - docks for large ships, nor a system of moats, ditches and diversion channels.

Answer:

C. something built up, such as walls, use to prevent the overflow of water from a river or lake