Answer:
The correct answer would be, Pester Power.
Step-by-step explanation:
Pester power is the power of the children to pressurize their parents to buy them a product which they has seen being advertised on the media.
So in this example, when Austin walks into the grocery store with his mother, he sees a candy like cereal whose advertisement he saw on the television. He asked his mother to buy him that product but her mom denied. Then he started to pressurize his mom by begging, bargaining and pouting until his mother gets ready to buy him that product. So Austin actually demonstrated the Pester Power.