Which metal is known for being light, corrosion-resistant, and ductile, often alloyed to enhance its tensile strength?

Aluminium is recognized for its lightweight nature, exceptional resistance to corrosion, and high ductility, which makes it highly adaptable for various applications. Its lightness is primarily due to its low density, allowing for easier handling and transport in engineering projects. Additionally, aluminium has a natural oxide layer that forms on its surface, providing significant protection against corrosion in a variety of environments.

Furthermore, aluminium is often alloyed with other metals, such as copper, magnesium, and silicon, to enhance its mechanical properties, including tensile strength. This makes it a popular choice in industries such as aerospace, automotive, and construction, where strength and weight efficiency are crucial.

The other choices tend to have different properties or applications. For instance, copper is heavier, and while it has excellent electrical conductivity, it is not typically as corrosion-resistant as aluminium. Zinc is often used as a protective coating or alloyed with other metals, but it does not have the same ductility or extensive use as aluminium. Brass, being an alloy of copper and zinc, incorporates some properties of those metals but does not match aluminium's lightweight and corrosion-resistant characteristics.