Which metal indicates a heavier load?

Nickel is known for its higher density compared to the other metals listed. This increased density translates to a heavier load for the same volume of material. Nickel typically has a specific gravity of about 8.9 g/cm³, which means that it is significantly heavier than metals like aluminum (with a specific gravity around 2.7 g/cm³) and brass (which can vary but averages around 8.5 g/cm³).

When analyzing the options, it's essential to recognize that while brass and copper also have substantial weights, they do not surpass the density of nickel. Aluminum stands out for its lightweight characteristics, making it unsuitable for applications where a heavier load is preferable. Thus, nickel is indicative of a heavier load due to its density and mass relationships in context with these other metals.