These are the  tears produced in response to that strong emotion you may experience from stress,pleasure,anger,sadness and suffering to indeed,physical pain.psychic tears even contain a natural painkiller called leucone enkerphalin-perhaps part of the reason why we fell better after crying
but i have is exactly matching except that last line
i know that to.maybe that just same what from the internet
than it's which class are you?
I am not sure but may be it relates to your brains pressure, anger, and when you feel sad. even you may have observed that when you weep you feel light and your eyes feel even lighter and your brain feels to be freshed and more determined too. I have observed that any event due to which you have weeped very much then that event will never forget you throughout your life time. some doctors say that sometimes you should weep. there's often a proverb "if you weep then it doesn't means that you are weak, it is a symbol that you have been strong for a long time."
well your answer is correct and also you haven't copied it