Because theres gravity that hold it down?
Is this a opinion question if so I have an opinion otherwise it would be vulnerability,money,And the fact that they are easy targets because they're normally are alone unless they are in a group or when they are separated from their group it really does just depend on that factor. Let me know if any of that helped..sorry if it doesn't.
Answer: food desert
Explanation: Food desert which is the direct opposite of food oasis is an area with decreased or limited access to affordable healthy food i.e decreased access to food and availability of healthy food.
Food desert is a good example of institutionalized bias in food system that have a negative impact on health of people living in such areas. Many groups that have entered the US have experienced this form of discrimination in one form or the other.
An implicit detail is a hint or seggestion.