The answer to this question is D
Answer:
4. Bronze was made by heating tin and copper and mixing them together which created liquid bronze. This was poured into sand or clay molds and allowed to cool; This was called casting, and it was used to make most bronze objects like swords, knives, pins, etc.
9. This was a period of time where people sought to understand the world through science and logic. They were convinced that the world is governed by universal laws, sometimes called universal constant.
The significance: This was the same type of thinking that influenced the founding of our founding fathers when the constitution was written. Over 50% of our founding fathers were enlightened thinkers.
Explanation:
Just needed some points :)
What finally enabled sturdy skyscrapers was sturdy steel, which is a mixture of metals and other elements, such as carbon, which is distinguished by low cost on one hand and strength and flexibility on the other.
