Question

what is the purpose of green roofs and green spaces in urban areas?

to decrease the amount of runoff
to promote industrial growth
to enhance recreational areas

Explanation:

Green roofs and green spaces in urban areas help absorb rainwater, reducing runoff. They also provide areas for relaxation and recreation. Industrial growth is not a typical purpose of green roofs/spaces.

Answer:

to decrease the amount of runoff, to enhance recreational areas