The principal role of setae in earthworm is --------

Options :
  1. respiration
  2. locomotion
  3. excretion
  4. assimilation
Answer and Explanation :-

Answer: Option 2

Explanation:

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Despair is the price one pays for self-awareness. Look deeply into life, and you'll always find despair.
-Irvin D. Yalom When Nietzsche Wept