The phrase "a region which has" is correct and usable in written English.
It can be used when describing a specific area that possesses certain characteristics or features.
Example: "The study focused on a region which has a diverse ecosystem, supporting various species of flora and fauna."
Alternatives: "an area that possesses" or "a zone characterized by".
It is also a region which has changed much since the Romanian revolution of 1989.
Dagestan is a region which has not been spared by disasters; some bad things have happened there.
Bantul District is a region which has variation of landuse such as settlement, agriculture area, tourism, and conservation area.
The program provides diversionary activities to about 1,000 children in a region which has recurring issues among its youth population, including volatile substance abuse.
But weak health systems and frequent cross-border travel have hampered efforts to contain the virus in a region which has never before experienced an outbreak.
The project site is located in a region which has the potential of being seriously affected by probable seismic events occurring along the Çubuk Fault Zone.
Even more impressively, a region which had become a byword for financial instability mostly sailed through the recent recession.
It's a power struggle that has the potential to create unbearable tensions in a region which had only just begun to believe in peace.
His election to the Commons in 1964 helped prompt a Liberal revival in a region which had a longstanding loyalty to the party dating back to land reform legislation of the 1880s, but had gradually fallen into Tory hands; by comparison with that party's grandees, Russell practised an active, constituency-based form of politics.
This, in a region which having long lagged behind the UK average on productivity, was now significantly ahead of it, the only part of the country to have a trade surplus with China.
For one projection analyzed by Scannell et al. (1995) and Hilgetag et al. (2000b), no Δtype was available, because it targeted a region which had not been assigned a structural type.
