Who defined stress as the response of the body to any demand whether it is caused by or results in pleasant or unpleasant condition?

Hans Selye

his definition of stress is response-based in that i conceptualizes stress in terms of the body's physiological reaction to any demand

Explanation:

hell yea you and it's kinda gross lol

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