The number of children who are visually impaired is than the number of children who are intellectually or developmentally delayed or learning disabled.

From statistical records of early childhood development, it has been found out that the number of children who have visual impairment is significantly less than the number of children who have delays intellectually or developmentally or who have some sort of learning disability.

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.