Which sentence is correct?
-the packaging of the boxes has to be strong enough
to protect the goods that is being transported.
-the packaging of the boxes have to be strong enough
to protect the goods that is being transported.
-the packaging of the boxes has to be strong enough
to protect the goods that are being transported.
-the packaging of the boxes have to be strong enough
to protect the goods that are being transported.

#3 is correct.

Problems with the others:
#1 - "is being" should be "are being" because "goods" is plural
#2 - "have" should be "has" and "is" should be "are" (boxes and goods are plural)
#4 - "have" should be "has" (boxes are plural)

It could be 1, 2, or 4, depending on the context.1.) they could have had a fight, and she is too humble to say anything further. she wants robert to say something first.2.) maybe he's staring at a computer playing tetris while she's wearing a *really* tight red dress. just sayin' xd3.) is unlikely given that it's only one sentence worth of context long. 4.) it's possible their relationship is more 'mutual hatred' and they tolerate one another.it could be 1, 2, or 4, as long as you can provide sufficient explanation why. remember this as you write!