Question

Give an example of a useful change that can also become a harmful change at times. Explain how it can be both useful and harmful.​

Answer 1

Answer:

They are called harmful or undesirable changes. Examples: Milk turning sour and food getting spoilt, rusting of iron, breaking of a window pane and a forest fire are harmful or undesirable changes.

15 examples of useful changes in the environment

• Flowers into fruits.

• Left overs into composts.

• Animal skins to a tanned leather.

• Steams into clouds.

• Pits into ponds.

• Ponds into lakes.

Explanation:

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