Everyone was listening to the news of earthquake with mounting anxiety.

Answer: Option C

curiosity : a strong desire to know or learn something.
grief : intense sorrow, especially caused by someone's death.
uneasiness : a feeling of anxiety or discomfort.
eagerness : enthusiasm to do or to have something; keenness.
anxiety : a feeling of worry, nervousness, or unease about something with an uncertain outcome.


Synonym of anxiety is uneasiness