I was told to find the relative humidity of an area when the dry bulb on the psychrometer is 20 degrees Celsius and the wet bulb is 15 degrees Celsius . I found the temperature difference between the two and based on an information table , concluded that the relative humidity is 59 % . It then asks you to find the mass of the water that is in the air .
According to the above context, choose the best option to answer the following question.
Question: What does the narrator seem to be studying ?
Options:
- They are studying air quality sciences .
 - They are studying global warming .
 - They are studying weather .
 - They are studying geology .


They are studying weather .