| Fill in the blanks: |
| (i) The domain of water is referred to as _______ |
| (ii) Human beings interact with the ____ and modify it according to their need. |
| (iii) ____ is a trade in which goods are exchanged without the use of -money. |
| (iv) ____ revolution has made communication easy and speedy. |
Answer:
(i) hydrosphere (ii) environment (iii) barter system (iv) information
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