Answer:
increased, 600,000, ✔ It increased dramatically.
Explanation:
CORRECT!!!!
The iron made from iron ore or smelting iron in blast furnaces or of ilmenite in an electric furnace is called pig iron. It is called pig iron due to the resemblance of ingots produced in the molds to the shape of piglets.
During 1720- 1860 the trend in pig iron was increased due to the rise in industrialization.
During the 18th century, the industrialization and mining industry development the use of pig iron increased dramatically till the early 20th century. According to the graph pig, iron production increased by about 600000 tons.
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