The cat hid under the bed because it was scared of the dog.

Meaning: This means that the particular cat in the story concealed itself underneath the bed's frame due to its fear of a dog.

Choice of Words: The cat refers to a specific feline animal in the story. Hid implies the cat made an effort to conceal itself from view. Under indicates the cat positioned itself beneath the bed's frame. The bed is the piece of furniture used for sleeping. Because introduces the reason for the cat's behavior. It was scared describes the cat's emotional state. Of the dog specifies the source of the cat's fear, which is another animal, namely a dog.