building evidence through ongoing investigation. identifying a hypothesis that supports the data. making conclusions about evidence from results. proposing data that is easy to understand.
Some instruments record oxygen levels in the ozone layer of Earth's atmosphere. Keeping a record of this data for many years is an example of

Options:
- building evidence through ongoing investigation.
- identifying a hypothesis that supports the data.
- making conclusions about evidence from results.
- proposing data that is easy to understand.

building evidence through ongoing investigation.