Which is the following is the same as 'Steel', 'Bronze', 'Brass' — i.e., pick another alloy (not a pure element or compound).

Introduction / Context:
Steel, bronze, and brass are alloys. The question asks you to select another alloy from the options while rejecting pure elements, minerals, or simple compounds.

Given Data / Assumptions:

• Alloys are mixtures of metals (and sometimes nonmetals) with metallic properties.
• Options include a mineral, an alloy, a molecule, and an element.
• We must choose the alloy.

Concept / Approach:
'Magnalium' is an alloy of magnesium and aluminum. 'Calcite' is a mineral (calcium carbonate), 'methane' is a hydrocarbon molecule, and 'zinc' is a chemical element. Therefore, 'Magnalium' alone matches the alloy category.

Step-by-Step Solution:
1) Identify the shared class: alloys.2) From options, select the entry that is an alloy.3) Choose 'Magnalium'.

Verification / Alternative check:
Materials science references list magnalium as Mg–Al alloy; bronze is Cu–Sn; brass is Cu–Zn; steel is Fe–C (and other elements).

Why Other Options Are Wrong:

• Calcite: Mineral (CaCO3).
• Methane: Molecular compound (CH4).
• Zinc: Pure element.
• None of these: Incorrect because 'Magnalium' fits.

Common Pitfalls:
Confusing minerals or elements with alloys; remember alloy = metallic mixture.

Final Answer:
Magnalium