How might the different theories of motivation explain why some people engage in high-risk behavior such as skydiving, stock-car racing, and bungee jumping while other people prefer to avoid any potentially dangerous situations?

It's rather psychological question. People often pre-judge about extreme actions in this case high-risk behaviour, based on their personal experience... And because of the basis of pre-judgement that they made almost never changes in extreme cases unless some kind of a drastic change in their life appears, they will keep telling themselves whenever they will be asked about it and therefore they will avoid it.

Information on the cost of things, quantitative data has to do with numbers, qualitative data uses details such as taste, appearance, what it looks like etc. 

Ithink u should look on google