This is the 4603rd most frequent Korean word.
감소하는
"Decreasing" or "diminishing."
In this sentence, '감소하는' describes '인구'(population) as decreasing. It is used as an adjective modifying the noun '지역'(region).
인구가 감소하는 지역이 경제적으로 어려움을 겪고 있습니다.
Regions with decreasing populations are facing economic difficulties.
Here, '감소하는' is used to describe '체중'(weight), indicating weight that is decreasing. It acts as an adjective to provide additional information.
체중이 점차 감소하는 것이 건강에 좋은 경우도 있습니다.
Gradually decreasing weight can sometimes be good for health.
In this case, '감소하는' is used to describe '산소 농도'(oxygen concentration), denoting its reduced state. It modifies the noun to specify its characteristic.