Which of the following metals is typically chosen for its lightweight properties?

Aluminum is typically chosen for its lightweight properties because it has a low density compared to other metals, making it an ideal material in applications where reducing weight is essential. This property is especially valuable in industries such as aerospace and automotive, where lighter materials can lead to improved fuel efficiency and performance. In addition to being lightweight, aluminum also offers excellent corrosion resistance and good strength-to-weight ratios, making it a versatile choice for various metal fabrication projects.

The other metals listed tend to be heavier and are chosen for different properties, such as strength or resistance to corrosion. For instance, iron and stainless steel are known for their strength and durability, while copper is valued for its electrical conductivity rather than its weight.