The weather studies fall under atmospheric science.The Christopher and Emma should learn about the local weather and then identify affects on the locality.
Step-by-step explanation:
The weather studies are dynamic. Sometimes weather follows trend but in some cases weather does not follows trend and there is heavy rainfall or snowfall than expected. The forecast of weather is very difficult to be accurate. However near guess can be made about the weather conditions by observing the trends of previous years.
, 3 is a factor of both 3 and 9
is your answer in simplest form.