Simplify the following text for a Grade 7 native English-speaking person.
Original: Research into the food industry of the United States , whose food supply is the most diverse and abundant of any country in the world , found food waste occurring at the beginning of food production .
Simplified: Research has been done to see where food waste occurred . The researchers looked at the food industry of the United States and found that food was wasted at the beginning of the food production .