the ability to revolve around the central ball a magnet in each ball a representation of oceans on each ball a source of thermal energy
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Giselle makes a model, using foam balls, to represent the events in a solar eclipse. To demonstrate this phenomenon best, the foam ball model should have which characteristic?
Possibilities:
- the ability to revolve around the central ball
- a magnet in each ball
- a representation of oceans on each ball
- a source of thermal energy

the ability to revolve around the central ball