Question

How many legs does a leech have?What is its habitat and can it be called an insect?

Answer 1

Leech does not have any leg. Leech occurs in ponds, lakes, tanks, swamps and slow streams where it either swims or grips objects with its suckers and moves by looping. Leech is a blood sucking parasite feeding on the blood of fish and frogs and also of cattle and humans.
Leech cannot be called an insect because a typical body form present in insects that is head, thorax and abdomen is absent in leech.
Also leech belongs to phylum Annelida while as insects belong to phylum Arthropoda.