It would be the third option because inextricably basically means can not be separated or detangled and the sentence is basically saying how because they are sisters , their memories are always linked to eachother
The two elements are:
An interesting hook that helps draw the reader in
The essay's main idea
<span>carefully and scientifically :P</span>
This is true. The proper term is body language and it can help display emotion or context for words