Vigorous exercises make our breath faster and deeper and increases our heart rate. It's being said that when doing vigorous exercises we're not able to talk fluently (unlike when doing moderate exercises, when we can talk normally).
Jumping rope is a moderate exercise until it lasts for a longer time, so I'd say it can be classified as vigorous.
Ranking lives and volleyball is rather a calm activity, so I wouldn't classify it as vigorous exercise.
Ice skating needs a lot of focus and manual activity, so it's probably a vigorous exercise.
