The pendulum weight swings side to side. It has maximum kinetic energy when it is mid-swing, closest to the ground. At this point it swings back up. Its kinetic energy is transformed to gravitational potential energy. Its maximum gravitational potential energy occurs when it is at its maximum height, when it stops, just before swinging to the other side.
I think 1 is B but not so sure about 2
it is TRUE that our immune systems don't work as well when as well when we're under psychological stress.
