What is the most specific grouping in a biome

There are five major types which are considered as tje specific grouping they are: aquatic, grassland, forest, desert, and tundra, though some of these biomes can be further divided into more specific categories, such as freshwater, marine, savanna, tropical rainforest, temperate rainforest, and taiga

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c. movement because i took the test and it lets me review my answers