This is the 4658th most frequent Spanish word.
causándole
"Causing him/her/it."
In this sentence, "causándole" is used to indicate that the event caused concern specifically to the persons affected (indicated by 'a todos') through an indirect object pronoun and gerund form, linking cause and effect.
El accidente ocurrió rápidamente, causándole una gran preocupación a todos.
The accident happened quickly, causing great concern to everyone.
Here, "causándole" demonstrates how the act of sharing news induced a specific emotional response (indicated by 'alegría') in the individual referred to ('Jaime').
Le contamos la noticia a Jaime, causándole alegría inmediata.
We told Jaime the news, causing him immediate joy.
In this case, "causándole" is applied to express that the prolonged activity led to a mental state (fatigue) in the individual enduring the challenge.