At the art fair, he bought an unusual and beautiful gift for his aunt.
which word is the indefinite article?

The indefinite article is "an"

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reescriba la oración completa para incluir la forma posesiva de "declaración de derechos" en la oración a continuación.

la declaración de la declaración de derechos de que "todos los hombres son creados iguales" se aplica a todos.

in ray bradbury's short story "a sound of thunder", mr. eckels's fearfulness leads to drastic consequences for the rest of the world.

in the story, mr. eckels, who is a hunter, hires a time travel company to travel to the age of dinosaurs. although he is excited for the hunting expedition at the beginning, when they reach there and mr. eckels sees the tyrannosaurus, he feels frightened. as he is afraid of the tyrannosaurus, he steps off the path although he has been warned not to do it. by stepping off the path, the entire course of the future is affected: mr. eckart alters the future by stepping on a butterfly, which causes a new man to be elected president in the future. in that way, it is mr. eckart's fearfulness what triggers 'the butterfly effect' and what leads to drastic consequences for the rest of the world.