Le mostré los dibujos. Ni el uno ni el otro le ha contentado.
101. The conjunction because is porque. The prepositional phrase because of is translated a causa de. Por with the infinitive is often used for porque with a clause, and may be used for a causa de when the object of the preposition is a participial phrase.
I won't give you any more because you have enough already.
No te daré más porque ya tienes bastante.
Because of the rain the country was flooded.
A causa de la lluvia estaba inundado el campo.
That tribe obeyed him and respected him because he was (because of his being) older.
Aquella caterva le obedecía y respetaba por ser él mayor.
—EMILIA PARDO BAZÁN.