Which of the following does not prove that the earth is spherical in shape?

The correct answer is "tilting of the earth on its axis." The tilt of the earth's axis does not necessarily prove that the earth is spherical in shape, as a similar tilt could also occur in a non-spherical shape. The other options listed provide evidence that the earth is spherical in shape: - The curved horizon of the earth: when looking at the horizon from a high altitude, such as from an airplane or a mountain, the curvature of the earth can be seen. This is because the surface of the earth curves away from the observer's line of sight. - The eclipse of the moon: during a lunar eclipse, the earth passes between the sun and the moon, casting a shadow on the moon's surface. The curved shape of the earth's shadow on the moon provides evidence of the earth's spherical shape. - Aerial photograph of the earth taken by astronauts: photographs taken from space show the earth as a spherical shape, as the entire surface of the earth can be seen from this vantage point.