Question Detail
Question
Which of the following arthropod are totally aquatic?
Correct Answer
Option D is the correct answer.
Detailed Explanation
None of the listed groups are totally aquatic. While many crustaceans are aquatic, some (e.g., terrestrial crabs, woodlice) are terrestrial. Insects are predominantly terrestrial, though some have aquatic larval stages. Millipedes are entirely terrestrial. There is no arthropod group where all members are exclusively aquatic.
Hint
Consider whether every member of these arthropod groups lives in water throughout their life cycle.