Ducks are a type of bird.
Bees, ants, and mosquitoes are varieties of insect.
Lions and tigers are both types of big cat.
Roses and carnations are types of flower.
Cars, trucks, and buses are different kinds of vehicle.
?I just thought those as count nouns, which are used as uncount nouns. It's beyond my mind. Could you explain WHY the uses of those can work? Is it politic for me to consider All COUNT nouns can be variable ones in terms of context?
anonymous All COUNT nouns can be variable ones in terms of context? Maybe not all nouns, but a great many nouns can be either count or non-count nouns depending on the context. The case of "type of", "kind of", "variety of" is just one in which the following noun may change category.
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anonymousAll COUNT nouns can be variable ones in terms of context?
Maybe not all nouns, but a great many nouns can be either count or non-count nouns depending on the context.
The case of "type of", "kind of", "variety of" is just one in which the following noun may change category.
Personally, I would use the plural with "types", "kinds",