What is meant by "nation”?
The word "nation" means a sovereign state.'sovereign' means exercising power of rule.Nation is also referred to as a country.

What is meant by the word "welfare"?
Well, welfare means health, safety, happiness, and prosperity. These are what we all want to have in our life. We want the best for our country .we want to make it a place having all these qualities.

How welfare of my nation depends on my well being?
People living in the nation always think that if the nation changes then the other people living in it would also change. This is a very wrong thought. A class can never be called a good one until and unless all the students in it studies and behaves well. The same applies for our nation and the people living in it. Unless the people start to live a life full of happiness, love, safety and prosperity, the society can never progress.

I need to change myself first. I have to be a good person and be loving, caring and helpful to others. I cannot be rude to others and expect others to be kind to me. This is not possible. We all know that, “as we sow so we reap”. If I start the change just as sowing a seed then automatically others would follow me and gradually the whole nation would change and become the best one just as a big and strong tree. When other nations would see this change in my nation then they would also soon try to improve themselves which in turn would improve the whole nation. This is how the welfare of my country depends on my well being. 
this is very helpful for me
thanks but then why did u report it!
i didn't report it . i thing it was my fault
It all right! PLease mark my answer as the brainliest