Eloise is standing at the base of a hill, and she notices that Frasier is sitting halfway up this hill reading a book. If Eloise begins walking up the hill toward Frasier, will Frasier be able to see her the entire time she is walking up the hill? Respond very briefly.
If the hill's slope is constant and there are no obstacles or curvature hiding Eloise from Frasier's line of sight, then Frasier will be able to see Eloise the entire time she is walking up the hill. As she ascends the hill, her vertical position relative to Frasier increases, maintaining a direct line of sight. However, if the hill has undulations, curves, or if there are obstructions like trees or boulders, it's possible that there might be moments when Eloise is not visible to Frasier while she walks up the hill.