I have to submit the answer to this question before November 1 here's my question, it's confusing me

Describe how cyclical changes in the shape of Earth’s orbit
cause gradual climate change and affect the intensity and distribution
of sunlight falling on Earth.

Ah yes , the deadline motivates us all ; )

Cyclical changes in the shape of earth's orbit cause gradual climate change because when shape of Earth's orbit changes , the amount of radiation and sunlight it receives also changes , this causes places that did not receive alot of sunlight to become lit , and places with sunlight before to become a little dim than before , this variation over a period of years , decades causes gradual climate change.