Fact 1: Acactus stem is used for storing water. Fact 2: Typically, the liquid is water. Given the two facts above, a cactus stem is used for storing what?
Possible answers:
(a). dust;
(b). rain;
(c). excretory;
(d). nutrients;
(e). excretion;
(f). food;
(g). liquid;
(h). ice;
(g).