Answer:
B I hope I'm right sorry if I'm wrong
If you observe closely, you may see that these stars are shown only against some slides and not all of them.
The stars are just an indication that the particular slide has custom animation. That was you can quickly see at a glance if a slide has content that is animated.
The same star symbol is also shown when the slide itself has any slide transition set.
The <span>Bing homepage brings you to a page that has a different image as the background everyday, a search box and links to news so I think that's the right answer. You can have a look: </span>https://www.bing.com/
