Answer:
when you don't know what the word mean
Even though not everyone thinks they have rhythm, dancing can be a fun and active hobby.
Because if you just say sand it’s gonna sound plane but if you describe it’s it helps the reader imagine what they’re reading
The answer is Shannon asks that everyone meet at 8 o’clock.
Subjunctive mood is the mood that indicate a certain wish or expectation. When shannon ask everyone meet on that time, we can see that she expect/wish everyone she refers to be on time for whatever event she's planning for them in that day.