Question

what is the most common metal on earth?
copper
aluminum
iron
steel
rewatch

Explanation:

To determine the most common metal on Earth, we refer to geological knowledge. The Earth's crust and core composition show that iron is the most abundant metal. Copper is less abundant, aluminum is the most abundant non - ferrous metal but not the most common overall, and steel is an alloy (not a pure metal) and not considered in the abundance of pure metals.

Answer:

C. Iron