Keeping both feet on the ground and your legs extended, flex your thigh. A) What did you do to carry out this movement
B) Name of joint at which movement occurred:

You just carried out flex ion of the legs
The joint is the ball and socket hip joint

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.