Answer:
D. velocity
Step-by-step explanation:
All of the options can influence and change weather, except velocity because it is a term that do not affect anything by itself, if it would be for example air velocity it could affect weather creating tornadoes in a certain specific situation but as it is just velocity it has nothing to do with weather changes, all of the options influence weather, for example temperature and air pressure can cause precipitation, and precipitation and temperature can cause snowfalling.