When barbed-wire fences were introduced, this benefitted farmers d. By protecting crops from damage caused by animals.
Before fences made of barbed-wire were erected, animals such as cows roamed freely across lands.
This led to the animals destroying and eating crops to the dismay of farmers. Barbed-wire fences stopped this from happening and protected the crops from damage.
Find out more on barbed-wire fences at https://brainly.com/question/22467093.