Answer:
c) Pragmatics
Step-by-step explanation:
The pragmatic component of language refers to the social skills that we use in our interactions with others. In other words, it includes what we say, how say it and the body language we use when we say it. This component allows us to act "appropriately" in a social situation.
In this example Ariel approaches another group of children talking about baseball and she gets close to their faces and mentions her cats. The kids back away and continue talking about the baseball game, Ariel moves closer again and mentions another fact about her cats.
In this scenario, Ariel is lacking the social skills to approach the other group of kids (she shouldn't interrupt, she shouldn't get that close to them, she shouldn't change topics). By standing very close to them this is also part of her body language. Thus, we can see that she is lacking the basic components that would allow her to act "appropriately" in this social situation.
Thus, she most likely has a deficit in Pragmatics.