which is a natural factor that causes long - term climate change?\no earths position\no pollen grains\no…

Brief Explanations:

The Earth's position relative to the Sun (e.g., changes in its orbit, tilt) can cause long - term climate changes over thousands to millions of years. Pollen grains, fossils, and ice cores are used to study past climates rather than being natural factors that cause long - term climate change.

Answer:

Earth's position