Final answer:
Clara's receipt of an email suggesting accessories for her purchased dress exemplifies direct marketing, which is part of the promotion mix aimed at personalized consumer communication.
Step-by-step explanation:
Clara receiving an email from the dress company with information about how to purchase accessories that match her bridesmaid dress is an example of direct marketing. Direct marketing is a component of the promotion mix which is used to communicate directly to consumers through various channels such as email, mail, social media, or text messaging. This strategy enables businesses to target specific customers with personalized messages and is often employed to suggest additional purchases or accessories, as in Clara's case, after an initial sale has been made.