Answer:
<em><u>Communication</u></em><em><u> </u></em><em><u> </u></em>means to exchange our thoughts ideas,feeling,etc with one another.
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ㅋㅋ: Lol or haha (works either way :p)
대박: daebak (Wow/that’s sick!)
헐: hul (No way!)
짱: jjang (Awesome!)
These are really common slang words in Korean and their like super easy so like hope this helped! :D