Which of the following industries is classified as a heavy industry?

The correct option is Steel production.

Explanation:

Industries are broadly classified into heavy industries and light industries based on the weight, volume of raw materials used, and the scale of final products manufactured:

1. Heavy Industry: Refers to industries that involve large-scale operations, heavy equipment, complex machinery, and heavy or bulky raw materials. Steel production is a prime example of a heavy industry because it consumes large amounts of heavy raw materials like iron ore and coal, uses giant furnaces and heavy industrial equipment, and yields massive steel structures used in construction, transport, and machinery.

2. Light Industry: Refers to industries that process smaller, lighter raw materials to produce consumer items using smaller machinery. Examples include toy manufacturing, handloom weaving, and paper crafts.

Therefore, among the given choices, Steel production is classified as a heavy industry.