What technology brought about the end of the open range and large cattle drives in the american west? a. gatling guns b. tnt c. bessmer process d. barbed wire

Barbed wire.

Explanation:

The technology that brought about the end of the open range cattle and large cattle drives in the America west is Barbed wire.

Barbed wire is nothing but wire with cluster of short, sharp spikes set at a regular interval along its length. It mainly, used to make fences of farmed fields to protect from being grazed by herbivores. Moreover, it is used to make boundary of countries as line of control.

come closer and become far apart and become steam/gas

nah.   i'm just sleepy.