Inspect them and make sure that they are exact copies then delete one if they are the same.
Answer:
Choose Start > Control Panel > Appearance and Personalization > Personalization. Right-click an empty area of the desktop and choose Personalize. Select a theme in the list as a starting point for creating a new one. Choose the desired settings for Desktop Background, Window Color, Sounds, and Screen Saver
Explanation:
The one cell evolved into different categories by adapting to its human/animal/plant’s habitat
