이유로

이유로

"이유로" means "for the reason of" or "due to."

Here, '이유로' connects the cause (the importance of the class) to the necessity of participation.

수업이 중요한 이유로 꼭 참여해야 합니다.

You must attend the class because it is important.

In this case, '이유로' specifies the reason which caused the change in the outcome.

그런 이유로 결과가 달라졌습니다.

For that reason, the outcome changed.

In this sentence, '이유로' refers to 'reasons' related to health, establishing the cause for the action of applying for a leave.

그는 건강상의 이유로 휴직을 신청했어요.

He applied for a leave of absence for health reasons.