The sentence technique modeled in the eResource is called sentence variety. This involves changing the way a sentence begins in order to create interest and rhythm in writing.
regular speech
Changing Lanes - 2010 The Journey Begins was released on: USA: 1 September 2010
In formal writing you would not begin a sentence with because, therefore, the kind of sentence that begins with because is informal.
in medias res
if the word after it begins in a vowel
no because then it would be a sentence fragment.
No, "line manager" is not capitalized when used in a sentence unless it begins the sentence.
fear, uncertainty and doubt
Starting in medias res
You could have a sentence like: Of the following choices, which would you prefer?
A directly quoted sentence begins with quotation marks (" ").