Simplify the following text for a Grade 9 native English-speaking person.
Original: The Swiss psychologist and entomologist August Forel also believed that food sharing was key to ant society and he used an illustration of it as the frontispiece for his book The Social World of the Ants Compared with that of Man .
Simplified: The French psychologist and entomologist August Forel also believed that food sharing was key to ant society . He used an illustration of it as the frontispiece for his book The social world of the ants compared with that of man .