Why do meteor showers fall during predictable periods each year?

Ans The majority of meteor showers are a result of debris left behind by comets, although some are caused by the debris of asteroids. Comets and asteroids rocky remnants from the formation of the solar system orbit distinct regions of the solar system, leaving debris in their way. Asteroids are mostly found in the asteroid belt between the orbits of Mars and Jupiter. Comets are primarily found beyond the orbit of Neptune in the Kuiper belt. When the Earth annually crosses the orbits of one of these small objects, the debris rains into the atmosphere, causing yearly meteor shower.