What are hypotheses suggesting why urban children have more food allergies than children from rural areas? select the two answers that are correct.

Higher Population Density

Exposure of Rural children to bacteria

Explanation:

According to a new study which had a motive of mapping out children food allergies in th U.S.A, one hypothesis is the high population in the urban areas. This high population often triggers the development of food allergies in children.

Another hypothesis is the exposure of rural children early in life to certain bacteria associated with rural living, Amazingly, this bacteria may protect the children against hereditary hypersensitivity to certain allergens. Whereas, the children who have not been exposed to many bacteria may develop strong allergies to various types of food due to their body's nature.

d. air pressure decreases as altitude increases.