Answer : Option B) The relative humidity is higher at Roberta’s house than at Harry’s school.
Explanation : The relative humidity can be measured using the reference chart attached in the answer.
With the given information, we can find the relative humidity near Harry's school will be difference between the temperatures of dry and wet bulb respectively, which comes to 58 - 45 = 13 °C;
Whereas, the relative humidity at Roberta's house will be 58 - 50 = 8 °C;
It is clear that Roberta's house if much humid than Harry's school.
The percentage of relative humidity at Harry's School is 17 % whereas at Roberta's house it is 39.1 %.
This clearly states that Relative humidity observed at Roberta's house is greater than Harry's school.