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In what way was Arthur Holmes' idea ahead of Wegener's idea?

Answer and explanation

Correct answer: It suggested an internal mechanism of movement

Arthur Holmes advanced the continental-drift discussion by suggesting a possible internal force that could move continents. Wegener had correctly collected evidence such as matching coastlines and fossils, but he could not convincingly explain what power moved huge landmasses. Holmes connected movement with convection currents in the mantle, making the explanation more physically meaningful.

In a convection current, heated material becomes less dense and rises, while cooler material becomes denser and sinks. This continuous circulation could exert movement-producing forces beneath the crust. Therefore, option A is correct. Options B, C, and D contradict the scientific ideas associated with Holmes and do not explain his contribution.

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Arthur-HolmesWegenerMechanism

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