1. The problem asks: If the decimal moves two places to the right, which operation does that represent and why? 2. When the decimal point moves to the right, the value of the number increases by a factor of 10 for each place moved. 3. Moving the decimal two places to the right means multiplying the number by $10 \times 10 = 100$. 4. Therefore, the operation that causes the decimal to move right and increases the number's value by 100 times is multiplication. 5. The correct answer is: Multiplication, because the decimal shifts right when you multiply, making the number's value 100 times more.