A drought can change the color of an environment from green to brown.
Too little rain causes a drought.
Too little rain can change the color of an environment from green to brown.
Too little of what can change the color of an environment from green to brown?
Options:
(a) pool water
(b) energy
(c) bath water
(d) Acids
(e) algae
(f) heat
(g) water hose
(h) rain