01 How does the top elliptical surface of a cylinder appear as it approaches eye level?
Answer and explanation
Correct answer: B. Flatter and narrower
Explanation: The governing observation principle is that the apparent height of an ellipse depends on the viewer's angle to the circular surface. As the cylinder top approaches eye level, less of its surface is visible from above, so the ellipse becomes flatter and narrower. Option B is correct. It does not become square, and the other choices either reverse the change or contradict visibility.