Oil palm plantation becomes the most focusing study in recent year.
the most focusing study or the most focused study?
Oil palm plantation becomes the most focusing study in recent year.
the most focusing study or the most focused study?
Well first I do agree with 'CopperKettle' that an oil plantation can not be a study, but, it can be studied. Now for my real answer.
You would say focused because it's past tense.
Oil plantation becomes the most focused study in recent year.
the "recent year" is in the past, therefore you would use the past tense there.