For example, maybe you study best in quiet spaces, or maybe you need background noise to keep focused. You might do well with an organized desk space, or you might prefer to study while lounging on the floor. No matter which study style works best for you, the first step to academic success is designing an appropriate study space; the second step is, of course studying. All of this explains why the key to creating your perfect study space is knowing your own personal study style.
It makes the most sense because you don't know what horror is about to happen or maybe it isn't horror at all. The second don't make no sense because there's too little info. The third one doesn't make sense because you don't know the situation.