Meaning: This sentence describes a bird fiercely protecting its young from lurking danger.
Choice of Words: Protects is a verb that means to keep someone or something safe from harm. Young is an adjective that refers to a child or animal that is not yet fully grown. Fiercely is an adverb that means in a very determined and aggressive way. Danger is a noun that refers to something that could cause harm. Lurks is a verb that means to wait hidden in order to attack.