The stages of a developing wave cyclone (in order of occurrence) are stationary front, frontal wave, open wave, mature, and advanced occlusion
Front wave A wavy deformation of the front between two air masses. Waves develop northward from the ingress of warm air, usually moving along the front, with cold air in front and behind. Or the center of the storm moves more or less east as a "secondary" over the original cyclone along an extended cold front.
An extratropical cyclone, also known as a wave cyclone or mid-latitude cyclone, is a type of cyclone that forms at mid- or high-latitudes in areas of large horizontal temperature variation called frontal zones. storm system.
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The kind of variable in the responses “Democrat”, “Republican”, “Independent”, “Other”, and “No Response” is a categorical variable since the choices does not associate with any kind of unit.
Literally speaking, categorical variables are variables that fall into a specific category. Categorical variable is also known as qualitative variable.
Your answer to the question above is A
