used when referring to a person or thing that was recently mentioned or one that is close in space or time
이것, 그것
used when referring to a person or thing that was previously mentioned or one that is not close in space or time
그것, 저것 (pronoun)
used to indicate items or people that are nearby or in close proximity to the speaker
이것들, 이것들
used to point out or refer to specific people, things, or ideas that are at a distance from both the speaker and the listener
저것들, 그것들
used to refer back to someone or something previously mentioned, implied, or exemplified to emphasize its quality, nature, or outcome
그러한, 그와 같은
used to refer to objects or people that are close to the speaker and the listener
이, 이 꽃들
used to indicate objects or people that are distant from the speaker and listener
저것들, 그 것들