Honestly, I don't know why you can't just look stuff like this up yourself?

"The USDA defines food insecurity as a lack of consistent access to enough food for every person in a household to live an active, healthy life. This can be a temporary situation for a family or can last a long time. Food insecurity is one way we measure how many people can't afford food.

More than 34 million people, including 9 million children experience food insecurity in the United States."

https://www.feedingamerica.org/hunger-in-america/food-insecurity