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.
Answer:
July 9, 2015
Explanation:
It was released on macOS on July 9, 2015, and on Microsoft Windows on September 22, 2015, for Office 365 subscribers. Mainstream support ended on October 13, 2020, and extended support for most editions of Office 2016 will end on October 14, 2025, the same day as Windows 10.
Answer:
A cyber attack or hacking
Explanation: