I know I'm rather late but the answer is 8 and 13. (This question requires some background... so yea.)
To be uncomfortable with something?
The Right answer is a. an event, an action, or a situation that produces a result.
The explanation for this is that according to the dictionary Aurélio, cause is what makes a thing to be, to exist or to happen. It is the principle, the reason or the origin of something.
