Question

Give reasons.
(i) Man modifies his environment
(ii) Plants and animals depend on each other

NCERT Class 7th Social Science (Our Environment) Chapter 1 Environment

Answer 1

human beings are the most use full resource.Because human being uses all the resources with the help of their skill.
2)plants are autotrophs so they can prepare their own food .But human beings are heterotrophs and depend upon other animals or plants.so they are depending upon each other for food.

Answer 2

Answer:

Man modifies his environment in the following ways:

• He cuts forests and clears land for agriculture, industries, and habitation.

• He cuts forests and clears land for agriculture, industries, and habitation.He tills land for agriculture.

• He cuts forests and clears land for agriculture, industries, and habitation.He tills land for agriculture.He uses the land to build buildings, roads, and railways.

• He cuts forests and clears land for agriculture, industries, and habitation.He tills land for agriculture.He uses the land to build buildings, roads, and railways.He uses water.

• He cuts forests and clears land for agriculture, industries, and habitation.He tills land for agriculture.He uses the land to build buildings, roads, and railways.He uses water.He uses air for his survival.

• He sets up industries, factories, etc.

• He sets up industries, factories, etc.He does numerous other activities for his life, making it comfortable.

Plants and animals depend on each other in the following ways:

• Plants provide food to animals.

• They, in the form of forests, provide shelter to wildlife.

• Wildlife adds beauty to the forests.

• Animals provide manure to plants for growth.

• Animals also provide beauty to forests.

• Dead animals also provide humus content.

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