The Garden contains the Chloroplasts or solar panels which convert the sun's energy into usable chemical energy for plant cells. (Photosynthesis)
Chloroplasts are similar to solar panels because solar panels also convert the sun's energy to usable energy.
The Garden also contains the Cell Wall or City Gates. It provides an extra layer of protection and support for plant cells and gives plant cells their box shape.
The Cell Wall is similar to City Gates because both provide extra protection.