Why does the author call his driver 'cautious'. Give two examples to prove it.

When the author was travelling to
Verona, he met two little boys Nicola
and Jacopo aged nearly 13 and 12 respectively. They were selling wild strawberries. The driver Luigi warned the author against buying the wild strawberries from local boys because he suspected that the berries were not good for the author's health. This is why the author calls his driver Luigi cautious.