Answer: The size of the sparrow population would decrease dramatically to meet the demands of many predators, the hawks. Because the Hawks’s population increased so suddenly it would mean that more and more hawks would need to eat and their food sources is the small sparrow. Therefore the sparrow population would decrease due to too many predators hunting.
Both Radioactive dating of rocks retrieved from the world and Comparing cratering rates on one world to those on another.
Geologists can find the relative age of impact craters on a world because
the ones on top must be younger.
Scientists know the history of Earth's magnetic field because the magnetic field gets frozen into rocks, and plate tectonics spreads them out.
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The answer is A. Root crops, including yams, sweet potatoes, and taro, became more common.
The root crops became more common, and practically the basic food source. This was due to the fact that the climate and soil on the Pacific islands were excellent for growing them, and of course for having a sustainable food source.
