The milankovitch cycles may have changed earth's climate in the past. these cycles involve
volcanic activity on earth
plate tectonics
earth's tilt and orbit
sunspots

The Milankovitch cycles describe the effects of changes in Earth's movement on the climate over a long period of time. These cycles involve variations in things such as eccentricity (orbital shape), axial tilt along with axial precession. This results in changes in the solar radiation which reaches the Earth and thus affects the climate. The correct answer is Earth's tilt and orbit.

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