Coal used by a steel factory during the accounting year is a:

Intermediate good

The correct answer is Option 2: Intermediate good

Intermediate good is the correct answer because coal used by a steel factory is not consumed directly by final consumers. It is used as an input in the production process for manufacturing steel. Goods that are used for further production during an accounting year are called intermediate goods.

Option 1: Complementary good. Complementary goods are goods used together, such as tea and sugar.

Option 3: Substitute good. Substitute goods are goods that can replace each other, such as tea and coffee.

Option 4: Final good. Final goods are those purchased for final consumption or investment and are not used for further production.