a group of two or three syllables is referred to as a foot.
https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjX2PiTydneAhUrm-AKHcd8BvUQjRx6BAgBEAU&url=http%3A%2F%2Fwww.mammothmemory.net%2Fenglish%2Fliterature%2Fstress%2Fiambic-pentameter-shakespeare.html&psig=AOvVaw0bE4scuhNLQAY3LQ4a7I_E&ust=1542480315301492
thatsan example
<span>As the door slowly creaked open, Jessie peered carefully into the vast darkness, holding her breath.
The "slowness" of the creaking door and the "vast darkness" add a weight to the sentence unlike the others. </span>
The answer should be B) because social media is a long distance communication tool for people, so not C) since that's false, that's where most danger is at is online, not D) because that wasn't the original purpose, but sadly its become popular now and not A) because that's incorrect.
A to inform because it’s explaining some of what cheetahs do and how it’s known to people as the fastest mammal alive(informing you about cheetahs)
For an in-text citation, you would need the author's name and the page number. For example... <span>Romantic poetry is characterized by the "spontaneous overflow of powerful feelings" (Wordsworth 263).</span>