Sure. If the platform has viewing analytics, they can. For instance, on Facebook Stories, the person who posted the story can see the list of people who watched it.
Yes, someone can typically see if you watch their story. This is a common feature on many platforms to give users an idea of who's interested in their content. However, the level of detail and specific settings can vary by the platform.
Yes, it depends on the platform. For example, on some social media platforms, there may be notifications or analytics that show if a story has been shared with someone. Also, if the person you send it to mentions it to the original creator, then they would know.
Well, it depends on the app you're using for the story. For instance, Snapchat used to notify users when someone took a screenshot of their snaps (which are a type of story). But other apps may not have such a straightforward way. There are some third - party apps that claim to be able to track screenshotting, but they often violate the terms of service of the main apps and might not be reliable. So in general, it's hard to be certain if someone has screenshot your story.