China and USA with 18 climate zones
Congress was given control over trade between states. Hope it helps.
The answer is "<span>concrete operational thinking".
The concrete operational stage starts around age seven and proceeds until roughly age eleven. Amid this time, kids pick up a superior comprehension of mental activities. Youngsters start considering solid occasions however experience issues understanding unique or theoretical ideas.
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Answer:
While these mounds take many forms and served different purposes, with each in a sense telling its own story, all were built entirely by hand, usually by piling up earth one basket-full at a time. Some served as burial mounds for the honored dead, while other flat-topped mounds were parts of large cities or towns and held temples or ceremonial buildings, and still others were built in the shape of giant animals.
Charles Darwin traveled to the Galapagos Islands and observed that there were several different types of species of finches and tortoises. These different species of animals were contained to separate islands, all tailored fit for each island. This gave Darwin the idea that species evolve over time into new species.
