C. Thesaurus
Dictionary's are used to find the definitions of words.
Spell check is used to correct incorrect spelling
Wikipedia is used to learn about the meanings and backgrounds of things
I would say verbal irony, that's the only one that would make sense.
A watershed is an area of land where water drains to a single location. Building dams and rerouting rivers are two examples of ways humans directly impact water in watersheds. Humans also use water as a resource, drawing from watersheds for our drinking water.
Land use has a major impact on the water quality of both surface and ground water. Land use refers to the human use of the land. ... Certain kinds of land use can change the hydrology of the Watershed, altering the way water and pollutants move through the drainage basin.