If Quinton is standing in a valley and Esmeralda is standing on a hill facing Quinton, but there is a high wall between them, can Quinton see Esmeralda and why?

Provide a very brief response.
Quinton cannot see Esmeralda because the wall obstructs his line of sight. The wall creates a visual barrier that blocks any direct line that could be drawn from Quinton's eyes to Esmeralda. Even though Esmeralda is elevated on the hill, the height of the wall is significant enough to prevent Quinton from seeing over it. Esmeralda's higher position on the hill does not change the fact that the wall stands as an obstruction between them. Therefore, the presence of the high wall means that they cannot see each other.