Science is interesting because it is very joyful to learn our world around us. We can know about the our universe , our body , plants feature , kinds of organisms and much more . It includes biology , chemistry and physics . Science is very easy that anyone can learn and understand it and can use it for research . Everyone can be benefited by this .

Through the biology we can able to know about our surrounding . Biology also tell us about us . Our human system , the structure of plants and animals  . We study different organs in our body . We can know about our each body organs system and functions such as heart transfer as blood .

Now the subject is Chemistry . We use chemical in every our work . We use salt   ( Nacl) in our food , we use detergent to wash our clothes , we use fertilizers and pesticides for the good crops etc . Most importantly all the medicines are made up of chemical process . Hence it also give life to organisms . 

And the last is physics . Physics is the most important subject in the science . We can calculate speed of anything , we can calculate heat of anything etc . Through physics we can know  evolution of the universe and atoms.

Also with the help of these subject we can even make machines , robots . We also can find the way how to reduce pollution ( air pollution , water pollution , soil pollution , and noise pollution ) . We can able to remove corruption before it roots us and much more .We also can make weapons for our Indian army and police . With this technology we can also develop our villages by giving proper supply of electricity and water . When new technology arrived in India , unemployed can be employed . Even i can bet that there will be disease free environment in India after few years.

These all creates benefit to the mankind and lead to development in the future.Hence Science is very important for the development of our future

And if our future will be developed then our nation will also become healthy and happy and pollution free .
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what problems u will solve and what developments u will do.
make machines , robots ,proper supply of electricity and water in villages , make powerful and strong weapons for our Indian army and police.
As you know, Science doesn't only give you knowledge but also more enthusiasm. You can use Science in different fields. When it comes to the field of nation developed here's what you'll consider.
1) You can use Science by creating more powerful weapons for our Indian Army, so that one day we'll beat the weaponaries of USA!
2) Wouldn't it be nice, if nobody was ill and everybody was cured? Use Science and remove diseases from India. Make It A Disease-Free Country.
3) Imagine you being a scientist and you see so much of pollution when touring India. Wouldn't you rather like to clean it? That might not be possible but you can surely make a change by finding techniques of making water cleaner and planting more trees :)
Hope it helps. Please vote it as the brainiest answer!