Final answer:
The practice of posting the same content across different social media platforms is considered a deadly sin in social media marketing, and it relates to the phenomenon of selective self-presentation.
Step-by-step explanation:
The student's question refers to the complacency or repetition in posting identical content across different social media platforms, which is considered a deadly sin in social media marketing. It highlights the importance of adapting one's social media strategy to suit each platform's unique audience and content consumption style. When a person uses to only post images that align with their ideal self, this showcases selective self-presentation, which is a phenomenon common in new media where individuals control which aspects of their identity they choose to share.