The question was incomplete as the diagram was missing, however, the correct diagram is attached with the answer -
Answer:
The correct answer is - scale
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.
 
        
             
        
        
        
Planaria<span> can be </span>cut<span> into pieces, and each piece can </span>regenerate<span> into a complete organism. crazy huh</span>