1. what do mexicans believe the dead do on the day of the dead?

they believe that if they put up their lost loved ones pictures then they have the day of the dead to crossover and spend time with their living family. watch the movie coco if you need a better understanding

Explanation:

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)