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Classification involves a hierarchy of steps, each representing a rank or:
ACausality
BCategory
CCapacity
DCasualty
Answer & Solution
Correct answer: B. Category
1. Classification proceeds level by level.
2. Each level is both a rank and a named grouping.
3. Classification involves a hierarchy of steps in which each step represents a rank or category.
4. So the answer is a category.
_Source: NCERT Class XI Biology, Ch 1 'The Living World'_
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