Answer: Petroleum, Electricity and Steel
Explanation: The second industrial revolution is a period between the late 19th to the early 20th century which is characterized by massive growth and expansion of industrialization. The second industrial revolution is also known as the technological revolution most notable for steel production, expansion in electrification which was previously limited to very few cities and development of Petroleum and gas supply.
It shouldn't but sadly it still does in this day and age
"The Cold War" was an era <span>of high tension between the United States and the Soviet Union.</span>
The Caste System
The term "caste" is used to describe stratified societies based on hereditary groups not only in South Asia but throughout the world. Others might present a biological explanation of India's stratification system, based on the notion that all living things inherit a particular set of qualities.