Answer the following question given this paragraph: 

Scientists also collect rock and sediment samples from the seafloor. A dredge is a giant rectangular bucket that is dragged along behind a ship. The dredge picks up loose rocks lying on the seafloor. Gravity corers are metal tubes that fall to the seafloor. They slice into the sediments to collect a sample. The research vessel, the Joides Resolution , drills deep into the seafloor to collect samples of the sediment and ocean crust. Scientists analyze the samples for chemistry and their magnetic properties.


Q: Behind a ship, what is the giant rectangular bucket that is dragged along from the behind called?

 Choices:

- prop

- trousers

- wig

- dredge

A:
dredge
