Answer:
B
Step-by-step explanation:
Why A is wrong: A, the fog comes on little cat feet is figurative language. Fog is a low lying cloud, a type of weather, that definitely doesn't come on little cat feet.
Why C is wrong: "The frog sat like a bump on the log in a frog". This contains simile, because it says "like". So this is figurative language, and you can cross this one out.
Why D is wrong: "Fog fell over the lake like a ghostly waterfall". Again, this is simile, because it also contains "like."
Why B is correct: Fog can appear in a harbor and a city in real life, and that's that. Its, again, a type of weather, that occurs in places like cities, towns, etc.
Hope this helps :)
-jp524