| Answer | Crossword Clue |
|---|---|
| boundaries | A limit of a subject or sphere of activity |
| boundary | A limit of a subject or sphere of activity |
| peripheries | A marginal or secondary position in, or part or aspect of, a group, subject, or sphere of activity |
| periphery | A marginal or secondary position in, or part or aspect of, a group, subject, or sphere of activity |
| invasions | An incursion by a large number of people or things into a place or sphere of activity |
| sectors | A distinct part or branch of a nation's economy or society or of a sphere of activity such as education |
