[make] an observation
1
to notice or remark on something based on what one perceives or witnesses
- The scientist made an observation regarding the behavior of the lab rats during the experiment.
- Teachers often encourage students to make observations about the natural world during outdoor activities.
- The detective made an observation about the unusual pattern of footprints at the crime scene.
- In his journal, Charles Darwin made observations about the diverse species he encountered during his voyage on the Beagle.