Final answer:
The advertisement style using characters like the Energizer Bunny is known as 'real/animated product symbols,' which creates enduring brand mascots that establish a strong consumer association.
Step-by-step explanation:
The execution-style that creates a character, such as the Energizer Bunny or Starkist's Charlie the Tuna, to represent the product in advertisements is called real/animated product symbols. This style involves developing a distinct character or mascot that embodies the brand or product, creating a strong association in the minds of consumers. It is particularly effective as it creates a memorable and relatable image that can span decades, much like the Smokey Bear character, which has become a credible and domesticated symbol for forest fire prevention over the years.