What causes draught?

What are draught animals ? Give two examples.

(a) What are draught animals ? Give atleast 3 examples. (b) In which ways are draught animals utilized in India, particularly in hilly terrains and sandy deserts ?

What causes chromatic aberration?

What causes lightning?

What causes acid rain ?

What causes winds?

Give two uses of draught cattle.

What causes gigantism ?