In which sentence is the underlined clause an adverb clause?

a. plate collectors, which capture the energy from the sun, are used to heat water and homes.
b. we can harness solar energy wherever the sun shines.
c. the study of solar energy has turned into a science that has a goal of creating renewable energy sources.

Which statement best describes the use of the underlined word in the excerpts? in excerpt 1, it refers to personal growth, while in excerpt 2, it suggests the physical act of moving. in excerpt 1, it refers to personal growth, while in excerpt 2, it suggests scientific discoveries. in excerpt 1, it refers to societal advancement, while in excerpt 2, it suggests the gradual march of time. in excerpt 1, it refers to societal advancement, while in excerpt 2, it suggests steps toward a particular goal.