Question

Why is the silkworm called a useful insect?​

Answer 1

Because they produce silk by eating mulberry leaves. They also have a great environmental impact. Basically, they give us silk.

Answer 2

Silkworm is called a useful insect because it produces very expensive silk which is soft, elastic,shiny and rearing silkworm can impact greatly on county’s economy.
That’s why ,Silkworm are called as useful insect.