Question

Mention some useful and some harmful changes happening around you.

Answer 1

Answer:

HEY!!

I HOPE IT WILL HELP YOU...

Explanation:

The changes talking place in our surroundings and which are useful to us are called Useful changes. The changes which are not useful but harmful are called Harmful changes

Answer 2

Answer:

Examples of useful changes -

1. Cooking of food

2. Sharpening of a pencil

3. Formation of curd from milk

Examples of harmful changes -

1. Burning of a house

2. Food spoiling

3. Breaking of glass tumber

Hope it helps :D