How many types does the larva of silkworm moult?​

there are 6 lava of silkworm moult.

Silkworms will undergo molting up to four times since they grow so much before becoming an adult.

Explanation:

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101