Read this sentence from paragraph 6 of the story "Lifetime Service."

Stories were shared about my grandfather helping construct additions to neighbors’ homes, dredging the town lake in the 1960s so that kids could actually swim in it, offering sage advice to other entrepreneurs who wanted to start businesses in town, and offering service as a volunteer firefighter for years.

Select the phrase that means dredging.

HINT: use an online dictionary to look up the defintion.
scooping out dirt from

adding more water to

removing wildlife from

testing water samples from
adding more water to
removing wildlife from
testing water samples from