Simplify the following text for a Grade 4 native English-speaking person.
Original: Ubirrâ s proximity to the East Alligator River and Nadab floodplains means that food would have been abundant and this is reflected in much of the rock art here .
Simplified: Because it is close to the East Alligator River and Nadab floodplains , it means that there would have been plenty of food . This is shown in much of the rock art here .