The question was incomplete as the diagram was missing, however, the correct diagram is attached with the answer -
Answer:
The correct answer is - scale
Step-by-step explanation:
The thermometer used to measure temperature by comparison of the object or the parameter of the temperature to measure, with a calibrated pattern that is called scale.
A Thermometer has two scales on both left and right side: degrees Celsius on the left and degrees Fahrenheit on the right.
As given in diagram label with "A'' in a circle on the left side is The degrees of the scale.