The correct answer is Innovators developed a process to produce steel inexpensively.
The Second Industrial Revolution was born with scientific and technological progress that occurred in England, France and the United States, around the second half of the 19th century.
The discovery and use of new energy sources - oil (in the combustion engine), water (in hydroelectric plants), uranium (for nuclear energy), have further revolutionized industrial production. The list of inventions and discoveries is huge, which represented greater comfort for the human being.
Answer:
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Explanation:
The answer is option D
Preoperational intelligence allows children to think in symbols. Doing this goes beyond the children's senses and motor skills; this is where preoperational intelligence differs from sensorimotor intelligence because sensorimotor intelligence relies on children's motor skills and senses