Answer:
"behind", "from", "through"
In normal circumstances, other punctuation marks (commas, colons, or parentheses) should be used. When you want a phrase or another part of the sentence to have extra emphasis, a dash may be used.
Yes because you are stating what and who he is which are two different things. It needs two different commas.
Listeners get to use their imagination from the sounds on the radio as exemplified by a program in the early '60's called he Goon Show of the BBC in London which was a comedy show with many sound effects like horses clopping which made the program very entertaining.
Option 3 seems the most human and relatable!
