Which definition applies to physical fitness? a. a planned event that includes intentional, moderate to vigorous physical activity b. the ability to carry out daily tasks with vigor and alertness, without undue fatigue c. the release of endorphins that keeps you healthy and happy d. the ability to maintain balance and flexibility in all situations

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