(a) Earthworms are nature’s ploughmen. How ?
A. They make burrows in soil and bring lower fertile layer above the ground.
(b) How is soil a resource for all living organisms ? Give any two points.
A .(i) It is habitat for many living organisms.
(ii) Plants grow in soil which provide food, shelter, material for clothes.
(iii) Plants grows in soil and provide
(iv) Decomposition occurs in soil.