To solve the problem, we can follow these steps:
- Start with the initial temperature: 63°F.
- The temperature drops by 10°F: \[ 63°F - 10°F = 53°F \]
- Then the temperature rises by 6°F: \[ 53°F + 6°F = 59°F \]
Now the current temperature is 59°F. To find out how much the temperature needs to change to return to 63°F, we calculate the difference: \[ 63°F - 59°F = 4°F \]
Therefore, the temperature needs to rise by 4°F to return to the initial temperature of 63°F.
So the correct response is: Rise 4 °F.