From which stage of water cycle does the well obtain water

precipitation
condensation
groundwater
evaporation

Groundwater. Thats why scientist say its bad to drink water from a well.

i think the answer is a.keratin is the pigment responsible for skin color.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.