The best answer I'm getting out of this is 3. But this is tricky, good luck
Answer:
To show an omission of a word or words (including whole sentences) from a text.
To create a pause for effect.
To show an unfinished thought.
To show a trail off into silence.
<h2>
<em>#</em><em>L</em><em>E</em><em>T</em><em>S</em><em> </em><em>STUDY</em></h2>
<em>#</em><em>B</em><em>R</em><em>A</em><em>I</em><em>N</em><em>L</em><em>E</em><em>S</em><em>T</em><em> </em><em>LOVE❣️</em>
You should definitely not type your whole email in all capitals!
Also, you should keep you message brief, this is true: people receive a lot of emails and prefer to read them fast.
I think that the first option is correct (a): Emails don't usually have headings in the text: this would make them too long.
-with or together would be the correct answer
Hope this helps