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NCERT Class 7 Geography: Chapter 1, Question Give reasons Q.4
(i) Man modifies his environment
(ii) Plants and animals depend on each other
(i) Man modifies his environment because the are capable of modifying it according to their need and live comfortable life. Humans learn new ways to use and change environment and invented many things. Industrial revolution enabled large scale production. Transportation became faster. Information revolution made communication easier and speedy across the world.
(ii) Plants and animals depend on each other for their sustainability. Animals consume plants as they are the only producers and also takes oxygen from them. Plants are dependent on animals as they give out carbon dioxide which is important for photosynthesis. Also, dead remains of animals provide nutrients to the plants.
https://www.indcareer.com/schools/ncert-solutions-for-7th-class-geography-chapter-1-environment/