To find the difference in height between the two measurements, we subtract the initial height of the parasail from the final height.
The initial height is \( \frac{120}{1000} \) kilometers (which is equivalent to 0.12 kilometers), and the final height is \( \frac{150}{1000} \) kilometers (which is equivalent to 0.15 kilometers).
Calculating the difference:
\[ \text{Difference} = \text{Final Height} - \text{Initial Height} \] \[ \text{Difference} = \frac{150}{1000} - \frac{120}{1000} = \frac{150 - 120}{1000} = \frac{30}{1000} \] \[ \text{Difference} = \frac{3}{100} \text{ kilometers} \]
Thus, the correct response is:
Start Fraction 3 over 100 End Fraction kilometers.