This is the 2611th most frequent Korean word.
사람에
"To a person" or "to the person."
In this sentence, '사람에' (to the person) indicates the indirect object receiving the action, showing to whom the help is directed.
그 사람에게 도움이 필요합니다.
That person needs help.
Here, '사람에 대한' (about the person) denotes the topic of consideration or thought, connecting '사람' to the concept of 'about'.
사람에 대한 생각이 달라집니다.
Thoughts about people change.
In this instance, '사람에 따라서' (depending on the person) illustrates a conditional scenario based on the specific person.