Answer:
Tilt
Explanation:
The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the "ecliptic plane" (the imaginary surface formed by it's almost-cicular path around the sun).
Make a pie chart because it is the best at showing percentages. Charts are useful for organizing information because they have all the information clearly stated in front of you.
Author is the person who wrote or created the original work. Journal articles are used by most fields to publish their original findings. These documents are regarded as primary sources.
