D. Having to be tied to a fixed rate savings account.
<span>The core of the adaptive success characterized by population explosion was the result of: increased food supply
One of the main reason that people have in choosing a place to settle is the resource availability. Areas with largest important natural resources such as foods, water , and land tend to have a larger population compared to the areas that do not.</span>
<span>B.The cave temples were built as religious shrines and retreats for travelers and monks.
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