Final answer:
0 degrees Celsius is equivalent to 32 degrees Fahrenheit, which is the freezing point of water on the Fahrenheit scale.
Step-by-step explanation:
The question '0º Celsius = ____ Fahrenheit (freezing point of water)' is asking us to find the equivalent of 0 degrees Celsius in degrees Fahrenheit. According to the Fahrenheit scale, the freezing point of water is 32°F. Therefore, the answer is:
a) 32°
This conversion is based on the knowledge that the freezing point of water on the Celsius scale, which replaced the slightly different centigrade scale, is 0°C and the boiling point is 100°C. On the Fahrenheit scale, which is still the most frequently used in the United States, the freezing point of water is 32°F and the boiling point is 212°F.