The variety was too overwhelming . We passed orchards and orchards of neatly planted orange trees on our way back to the border . Again , the green ! At the border , the sound of Portuguese , the feel of pushing in line , and stepping on a discarded chicken bone in front of the immigration officer 's desk reminded me where I was .

Give answer the following question using evidence from the above passage: What may be the reason why they needed a reminder of where they are ?
None of the above choices .