Final answer:
A cold front refers to the boundary between a cold air mass and a warm air mass. It typically moves faster than a warm front and lifts warm air, causing it to cool and condense, resulting in the formation of clouds and potential thunderstorms.
Step-by-step explanation:
A cold front refers to the boundary between a cold air mass and a warm air mass. It typically moves faster than a warm front and lifts warm air, causing it to cool and condense, resulting in the formation of clouds and potential thunderstorms. Therefore, the statement that is not true of a cold front is a) It brings colder air mass.