Nelson is writing a procedural text titled "How to Give a Dog a Bath." Read his list of materials needed to achieve the goal.
Materials Needed
Large tub
Water
Small bucket
Soap
Towel
Nelson has most likely included a small bucket on this list in order to
allow the dog to drink water during its bath.
help the bather rinse the soap off the dog.
transport the soap and towel.
make sure the dog gets clean.