Suppose that the two carts are joined with a spring. The Red cart is held by the left hand at a fixed position, and the Blue cart is pulled to the right. Which force is the action force and which is the reaction force

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?