Why do people cry? what causes pain?

The reason people cry are for two reasons; One Reflex: the tears are cause by a reflex, from irritants such as wind, smoke, or onions. They are released to flush out these irritants and protect the eye. Emotional: Humans shed tears in response to a range of emotions. These tears contain a higher level of stress hormones than other types of tears.

                                               -Hope this helps-

Explanation:

Reflex: the tears are cause by a reflex, from irritants such as wind, smoke, or onions. They are released to flush out these irritants and protect the eye. Emotional: Humans shed tears in response to a range of emotions. These tears contain a higher level of stress hormones and etc

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d