What is the benefit of mentioning the tree in the verse?

The student: ...the tree

The Shaykh : The apparent benefit is that meaning it specifies the intended location, specifying the place, because the bank of the valley is wide and general, so specifying the place makes it clearer, since if Musa had been called from the entire bank, the matter would have been confused for him, but when the call was specified from a particular, specific direction, it became clearer and more distinct for him.