Final answer:
The scenario demonstrates exponential growth as the investment value increases exponentially with a 100% return each year.
Step-by-step explanation:
The given scenario exhibits exponential growth. In year 2, the investment earns a 100% return, doubling its value to two dollars. In year 3, the same 100% return leads to a total of four dollars in returns. Each year, the returns increase exponentially as the investment amount is multiplied by the return percentage.
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