How can we trace earthworms?
A. Colour
B. Smell
C. Predator
D. Worm castings
Answer:D
How can we trace earthworms?
A. Colour B. Smell C. Predator D. Worm castings
Explanation: During day time, earthworms live in burrows made by burrowing and swallowing the soil. In the gardens, they can be traced by their faecal deposits known as worm castings.