보호구역이 · 보호구역을
protected area, reserve; (school) safety zone
Example
이곳은 철새 보호구역이라서 사냥이 금지돼 있어요.
This is a migratory bird reserve, so hunting is banned.
Word parts
보 protect+호 guard+구 district+역 area
Literally 'protected zone'.
Good to know
On Korean roads, 어린이 보호구역 marks a school zone with strict speed limits.