What does a shaded square mean on a pedigree

It means that a male is affected

A square identifys a male

A shaded shape means it’s affected

Explanation:

b is the best answer for this question.

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a