hakgyoeseo dayanghan hwaldongeul haeyo.

-에서 marks the place where an action happens – “at” or “in” a location. Here, 학교에서 means “at school.”

• -에 can mean “to” (direction) or “in/at” (existence), but does NOT emphasize the site of an action.
• Use -에서 whenever you describe doing something at a place.

다양한 is an adjective meaning “various” or “a variety of.” In Korean, adjectives always precede the noun they modify.

• 다양한 활동 = “various activities”

Korean often omits 들 when plurality is clear from context or modifiers like 다양한. Adding 들 is possible but can sound redundant:

• 자연스러운 표현: 다양한 활동
• 어색할 수 있는 표현: 다양한 활동들

-을 is the object marker, showing that 활동 (“activity”) is what you’re doing with 해요 (“do”).

• With marker (clear, standard): 활동을 해요
• Without marker (very casual, less precise): 활동 해요

해요 is the polite present-tense form of 하다 (“to do”). Sino-Korean nouns like 활동 pair with 하다 to become verbs:

• 활동하다 = “to carry out an activity”
• Conjugated politely: 활동해요 = “(I) do activities”