Final answer:
Cold fronts are commonly associated with cooler temperatures, precipitation, and subsequent clear weather. They can also bring rapid weather changes such as thunderstorms due to shifting atmospheric pressures.
Step-by-step explanation:
Based on observations, cold fronts often share common characteristics such as:
- Bring cooler temperatures - Cold fronts are usually followed by a drop in temperature.
- Precipitation - They often bring various forms of precipitation, which can range from light showers to heavy storms.
- Clear weather - After the initial precipitation and temperature drop, cold fronts typically lead to clearer weather conditions.
Therefore, the most accurate answer to the observation of commonalities in cold fronts would be (d) They bring cooler temperatures and precipitation followed by clear weather. This encapsulates the typical sequence of weather changes associated with the passage of a cold front. The precipitation mentioned can include a variety of forms such as rain, sleet, or snow depending on the existing temperatures. Additionally, changes in atmospheric pressures can lead to rapid weather changes, including the potential for thunderstorms and gusty winds.