Harley decided she wanted to improve the shape of her arms by adding a tricep extension to her routine. which principle is at work?

a) principle of specificity

b) principle of overload

c) principle of progression

d) time

The correct answer would be a) principle of Specificity because Harley has chosen to do a specific exercise to reach a specific goal.

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