The phrase "a topic which has" is correct and usable in written English.
It can be used when introducing a subject that possesses certain characteristics or qualities.
Example: "The article discusses a topic which has gained significant attention in recent years: climate change."
Alternatives: "a subject that has" or "an issue which has".
Climate-conscious development is a topic which has received widespread attention.
"I don't think I have ever come across a topic which has attracted more adult antagonism," he says.
This paper reviews articles on cooperative advertising, a topic which has gained substantial interest in the recent years.
The optimization of thermal processing of foods is a topic which has received great attention during the last decades.
A topic which has received only little interest in optimization of DWC is the internal operation of the column, together with the mechanical design of the column.
Sharapova, who has perhaps borne the brunt of more criticism for grunting than anyone since Monica Seles, said she didn't think the men speaking up about grunting would change the debate significantly, a topic which has never been her favorite.
On the first week of the class, the students were asked to write a persuasive essay about the implementation of K-12 in the Philippines, a topic which had been a focus of debate among school and government authorities.
For her feature film debut, Andini chose to write about the sea – a topic which had long interested her and on which she had previously recorded documentaries.
Newport City Councilman Steve Rosansky revived talks last year about building the bridge, a topic which had been dormant for more than a decade.
Sustainability is a universal topic which has multidimensional effect on the environment and human life.
Output feedback design for non linear systems is a difficult topic which has attracted the attention of researchers with very different approaches.
