Lava is primarily composed of molten rock, which mainly includes silica (SiO₂), along with various minerals and gases. It does not primarily consist of the materials listed in your options.
If we were to pick the closest option in terms of general geological composition, it would be more about the minerals found in magma (the molten rock beneath the Earth’s surface) than pure elements like iron, nickel, or ore.
However, since none of the given options are correct, it is important to clarify that the composition of lava typically includes silicates like plagioclase, pyroxene, and olivine, among others, rather than specifically iron and nickel or any of the other combinations you've provided.
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