Read the given passage and answer the question that follows. Steel is tough, and it can easily be shaped, cut or made into wire. Special alloys of steel can be made by adding small amounts of other metals such as aluminium, nickel and copper. Alloys give steel unusual hardness, toughness or ability to resist rust. Steel is often called the backbone of modern industry. Almost everything we use is either made of iron or steel or has been made with tools and machinery of these metals. Ships, trains, trucks and autos are made largely of steel. Even the safety pins and the needles you use are made from steel. Oil wells are drilled with steel machinery. Steel pipelines transport oil. Minerals are mined with steel equipment. Farm machines are mostly steel. Large buildings have steel framework.

Why is steel often called the backbone of modern industry?

Question

Read the given passage and answer the question that follows. Steel is tough, and it can easily be shaped, cut or made into wire. Special alloys of steel can be made by adding small amounts of other metals such as aluminium, nickel and copper. Alloys give steel unusual hardness, toughness or ability to resist rust. Steel is often called the backbone of modern industry. Almost everything we use is either made of iron or steel or has been made with tools and machinery of these metals. Ships, trains, trucks and autos are made largely of steel. Even the safety pins and the needles you use are made from steel. Oil wells are drilled with steel machinery. Steel pipelines transport oil. Minerals are mined with steel equipment. Farm machines are mostly steel. Large buildings have steel framework.

Why is steel often called the backbone of modern industry?

Accepted Answer

**Solution:**

1. The passage states that "Almost everything we use is either made of iron or steel or has been made with tools and machinery of these metals."

2. This indicates that steel is fundamental to modern industry because it is widely used in tools, machinery, and many products.

3. The other options are either incorrect or not the main reason for calling steel the backbone of modern industry.

**Answer:** Steel is used in almost every tool and machinery.

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