Hey mate. What you have said is completely fine. It's all about justifying your response. I said LME (as he has to hold himself up in the face of fatigue) and Muscular Power (to pull himself up the cliff). You could have easily said strength, flexibility, or even balance. It's all about explaining.
Bud, i completely agree with you, i justified it by referring to when the climber has to quickly shift their arms and legs into climb holds in the rock in order to advance as that incorporates both speed and strength, however, in last years examiners report for the surfer, there wasn't such a diverse range of accepted components, rather three or four so it's debatable.. all depends on the person looking at your paper pretty much.