The Ellertson family took Grandpa Ellertson to dinner for his 75th birthday. In the crowded, noisy restaurant, he experienced difficulty understanding conversations around him due to interference

Extending ethology to humans, researchers have investigated

A) bonding between human infants and their mothers. B) blood flow through the brain as a person engages in tasks. C) the way that children perceive, store, and retrieve information. D) the mental schemes that children use to understand the world.

The best example of the symbolic play of a 12-month-old would be which of the following?

A) Safi pretends to row a boat using a mop and a broom as oars. B) Emily climbs into her parents' bed and sings. C) Marcus uses toy dishes to pretend he is eating. D) Yuki puts on her mothers' shoes and carries her diaper bag to pretend she is going to work.