What does 멋져요 Seredity의 모든 사진작품 mean ? I post pictures on my Instagram and I got this comment. How do I respond?

What does this sentence mean? "안녕하세요! 좋은 소통햐며지내요!선팔 감사합니다~ 맞팔왔어요~~" Also, how do I respond to this sentence in Korean?

What does this sentence mean? "귀여워!그리고 저도 아미인데 최애 정국이에요 ㅋㅋ" I know a few words in here but I don't know the full meaning of the sentence. Also, how do I respond to this in Korean?

What is the meaning of 모여라 ?

What does mean 촬영이네요? What does 촬영 이네요 mean*** Sorry that was a typo. I know 촬영하다 is to film, but what is 이네요 doing with 촬영?

What does 장피해 mean?

What does 나리 mean?

Explain 제 a little more in depth I know 제 means "my" in certain situations and when combined with 가 (제가) it means I. However, why does 제 mean "the" in 제 구역, because I have heard there is no translation in Korean for the word "the".

Give example of when and how to use 게. I know 게 means crab and I also know I can use it as a noun such as 내게 , but when else can I use 게? Does 게 have another meaning to it?