Meteorology is best defined as the study of

Meteorology is the scientific study of the atmosphere that focuses on weather processes and forecasting. Meteorological phenomena are observable weather events which illuminate and are explained by the science of meteorology. Those events are bound by the variables that exist in Earth's atmosphere.

The chief factors comprised by the science of meteorology are temperature, barometric pressure, humidity, sunlight and the interactions of each variable, as well as their variability. An example of meteorology would be the NOAA, who study the ocean and the atmosphere.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.