You are presented with the question "Each planet has what?" and the following answer choices: 
- different cycles of day and night
 - genetic diversity
 - identical atmospheres
 - life
 - structure and function
 - water
 - global ecosystems
 - important habitats

Now knowing that aplanet rotating causes cycles of day and night on that planet and each planet rotates at a different pace, choose the best answer.


 

 different cycles of day and night        