Question

bessemer process improvements in communications second industrial revolution rise of oil and electricity industries which development completes the diagram? invention of television invention of the steam engine spread of railroads across the nation introduction of the u s patent system

Explanation:

The Second Industrial Revolution was characterized by advancements in various fields. The Bessemer process improved steel - making, improvements in communications were key, and the rise of oil and electricity industries were major developments. The introduction of the U.S. patent system encouraged innovation during this period. The invention of television came later, the steam engine was a part of the First Industrial Revolution, and the spread of railroads across the nation was more of a First Industrial Revolution - related development in its initial phases. The U.S. patent system was important for the Second Industrial Revolution as it protected new inventions and spurred industrial growth.

Answer:

Introduction of the U.S. patent system