Student or Learner
Should I use 'which is' in this sentence: 'This unprecedented dataset is a powerful tool to study how the heat source driving a sea-floor hydrothermal system changes in time and response to geological events, (which is) a key research question in hydrothermal vent studies.'?
You can omit 'which is', but should change the comma after 'events' to a dash.
'...response to geological events—a key research question....'