Answer:
A major part of the Dia de los Muertos celebration, which originated in ancient Mesoamerica, is the altar, or ofrenda (offering). It usually contains three levels—for Heaven, Earth, and the underworld and represents the four elements earth, wind, fire, and water. These several elements welcome, celebrate, and pay homage to the dead.
Explanation: the three elements are Heaven, Earth and the underworld, i learned this in 3rd grade because im Mexican