Meaning: This sentence tells us about living creatures existing or having life in the valley.
Choice of Words: Animals are living creatures, lived is the past tense of live, meaning to exist or have life.
Alternative Expressions
Creatures dwelled in the valley.
Meaning: This sentence conveys the same meaning as the first one, using different words.
Choice of Words: The word "creatures" is another general term for non-human beings, while "dwelled" means to live in a place for a period of time. The valley, as mentioned before, is a low area of land.
Beasts inhabited the valley.
Meaning: This sentence also describes the fact that animals lived in the valley, using more specific language.
Choice of Words: The word "beasts" is a more specific term for animals, often referring to large or wild animals. "Inhabited" means to occupy or live in a place. The valley, as we know, is a low area of land.