Hello Woojung,

Thank you for submitting your homework.

Please check my corrections. Thank you..

symbol in the Korea

CORRECT: Symbols of Korea

>>For countries, we use preposition 'in'. The word 'the' is unnecessary. But in this context, the correct preposition is 'of' ? belonging to or relating to someone or something. When talking about general things, use plural form of nouns.

Magpie
Taegeukgi
Mugunghwa
The seal of state the great seal etc

CORRECT: The symbols of Korea include Korean Magpie, Taegukgi, Mugunghwa, the seal of state, etc.

>> Your sentence is incomplete. Proper nouns begin with a capital letter.