Question

what happened if there were no farmers?

Answer 1

if there were no farmers then no one is there to grow crops for us and food to. we are dependent only on farmers for the crops

Answer 2

If there are no farmers then you can think that there is no life as farmers play important role in our life cycle because they grow food which is needed for us to live if there are no farmers then how will could be grown who will do farming and how will we get food and without food no person can survive for more then 2 to 3 months (atleast)..
Even it is possible that if there are no farmers the one who are engineers, doctors
and all will also start doing farming.. not only humans but also animals will not get food to it and this can disturb our ecosystem..
so farmers play an important role in our life..