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Q: Called the farmer's 'friend', the ––––– helps in the breakdown of complex organic matter as well as in loosening of the soil.
  • A. weed
  • B. locust
  • C. rat
  • D. earthworm
Correct Answer: Option D - An earthworm is a terrestrial invertebrate that belongs to order opisthopora and phylum Annelida. It is considered as friend of farmer because it helps to compost manure for them.
D. An earthworm is a terrestrial invertebrate that belongs to order opisthopora and phylum Annelida. It is considered as friend of farmer because it helps to compost manure for them.

Explanations:

An earthworm is a terrestrial invertebrate that belongs to order opisthopora and phylum Annelida. It is considered as friend of farmer because it helps to compost manure for them.