A stem is used to store water by some plants.
Stems stems are the support structures of a plant.
The support structure of a plant is used to store water.
Where is water stored in a plant?

a: dormant state
b: at or near the margins
c: colder and wetter
d: the support structure
e: it keeps an organism warm
f: they body they live in
g: It remains dormant
h: excretory structures