It can be said that this excerpt is an approach to the "forbidden door". it seems that the reader gets in the mood by reading this description.
The paragraph is full of vivid ideas which makes it simple to picture what is happening and how this person is feeling when listening to that tapping,
The first one is B because it is just stating the facts
The density of liquid can not only help with sciences, but can help you with finding out the murderer of a crime novel. For example, if the killer had poisoned the ice or drink, knowing what the density of liquid can help you find out what poison was used or the antidote.
C The kittens in the basket meow loudly for their mother
The key feature of writing is a paragraph.