Answer:
1. Insects (Includes Ants, butterfly, grasshopper, cockroaches etc. Over 1 million known species)
2. Crustacea (Includes shrimp, lobster, crab etc. Over 44 thousand known species
3. Myriapoda (Includes Millipede, Centipede etc. )
4. Arachnida (Includes scorpion, spider, mite, etc. Over 65 thousand known species)
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