Earth began as a mixture of about 90% stony, olivine-rich material and about 10% iron metal, just like the composition of chondritic meteorites. Soon after its formation the interior of the Earth is thought to have become very hot. What was the result of this increase in heat? A) The iron melted and collected in the interior of Earth to become its core. B) The olivine remained behind, becoming the mantle and the melted iron became the core. C) Both the olivine and iron melted and as they later solidified, became the mantle and the core. D) The olivine became the crust and the iron, melting, defended into the earth to become the core.

D. The olivine became the crust and the Iron melting defended the earth to become the core.

Explanation:

Earth was formed after it has went through a molten stage that led to the heavy materials sure as Iron metal moving inward to form the core, and the light materials moves toward the surface to form the crust.

The heat for the melting came from meteorite impacts which is usually very hot, the moon's impact, and the decay of radioactive elements.

Geological activity on the earth is driven from this initial source of heat at the earth's formation until now.

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

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