Ants were to Life

the ants move like cars in a line passing by,
collecting food while the ground is still dry,
they quickly hide away when there is a sign of rain,
as they built their home so the water wont drain,
some damage is done to their little nest,
but they build it back the same without rest,
for such a small creature with so much to do,
why does it exist and if we only knew?