Which word describes the scientific study of weather and the atmosphere?

a. meteorology
b. environmental science
c. geomorphology
d. atmospherology

a. Meteorology describes the scientific study of weather and the atmosphere.

Meteorology studies atmospheric effects and its phenomena on the weather. It falls under the discipline of atmospheric science which studies everything related to the atmosphere. Under broad discipline, meteorology only focuses on a specific study.  

Meteorologist conduct their studies by using scientific methods and principle to explain and forecast the weather. Their work focuses more on atmospheric research which covers remote sensing, air quality, and climate modelling. Another area of focus is operational weather forecasting. Furthermore, meteorologist also research the relationship of biological life and oceans.