Object permanence happens in which of piaget's stages?
a) sensorimotor
b) preoperational
c) concrete operational
d) formal operational

Your answer is simply preoperational

Definition-Piaget's second stage, the pre-operational stage, starts when the child begins to learn to speak at age two and lasts up until the age of seven. During the Pre-operational Stage of cognitive development, Piaget noted that children do not yet understand concrete logic and cannot mentally manipulate information.

Answer such tools are fail proof;

The skin in the outer ear canal has special glands that produce earwax. the fance name for this waxy stuff is cerumen.after the wax is produces, it slowly makes its way through the outer ear canal to the opening of the ear.