This is the 42nd most frequent Chinese word.
向
"Toward," "to," or "direction."
Here, '向' introduces the person being addressed or approached, in this case, the teacher.
我向老师请教问题。
I ask the teacher for guidance.
In this context, '向' indicates the direction towards which the action is directed, here 'forward'.
小狗向前跑去。
The puppy ran forward.
'向' specifies the direction of the action, which is towards the sky in this sentence.