What can make food but not eat?

Question

I've got a mouth, but I don't eat food.
I've got no nose, so I can't smell good.
I take deposits, but I'm not a bank.
I'm not the army, but I've got a tank.
At times I'm a river, at times I'm a pond.
When the dam purges, everything is gone.
What am I?

Answer 1

Plants
They make food using sunlight, minerals from sand and water. But they don't eat.

Answer 2

PLANTS OR TREES
THEY CAN MAKE FOOD eg: FRUITS BUT THEY DON'T EAT

Answer 3

THE SUN.........