The team will ___ the feature to 5% of users first.
To roll out a feature means to release it gradually. Roll out is the precise term; the others do not collocate with feature here. So roll out the feature is correct.
2 / 5
We decided to ___ the rollout after the error rate spiked.
You pause a rollout to stop it temporarily. Pause is the standard collocation; freeze up and stand by do not fit. So pause the rollout.
3 / 5
Once stable, we will ___ the rollout to 100%.
You complete a rollout when it reaches everyone. Complete collocates precisely; the others are informal or wrong. So complete the rollout.
4 / 5
Engineers ___ adoption metrics during the staged release.
You monitor adoption by tracking usage. Monitor is the technical collocation; watch over and look after imply care, not measurement. So monitor adoption.
5 / 5
A flag lets us ___ the release behind a toggle.
To gate a release means to control access with a switch. Gate is the established term; the others do not collocate. So gate the release.