Earth's orbit is nearly circular with only about 3% variation in distance throughout the year - from 147 million km at perihelion to 152 million km at aphelion. This small change cannot explain seasonal temperature differences. Instead, Earth's 23.5-degree axial tilt means different parts of Earth receive varying solar intensity at different times of year. Option B is wrong - the orbital shape change is real, not an illusion. Option C is factually incorrect. Option D is illogical - timing correlation doesn't explain causation.