Final answer:
At sea level, water boils at 212 °F, which is equivalent to 100 °C and 373 K.
Step-by-step explanation:
At sea level, water boils at 212 °F, which is equivalent to 100 °C, 373 K, and not applicable for 1000 °R (a value not used in this context) or 80 °C.
The Celsius scale defines the boiling point of water at 100 °C, and the Kelvin scale defines the boiling point of water at 373 K. Both the Celsius and Kelvin scales have the same incremental value change, meaning a change of 1 degree Celsius equates to a change of 1 Kelvin.
Therefore, since the boiling point of water at sea level on the Fahrenheit scale is 212 °F, it corresponds to 100 °C on the Celsius scale and 373 K on the Kelvin scale.