This is the 19592nd most frequent Korean word.
어른들을
"Adults" (plural form, referring to them).
In this sentence, '어른들을' is used as the object of the verb '존경합니다', meaning 'adults' as a plural group.
저는 어른들을 존경합니다.
I respect adults.
Here, '어른들을' conveys the idea of targeting or concerning adults, in an indirect object form associated with '자리', meaning 'seats'.
어른들을 위한 자리는 이쪽입니다.
The seats for adults are this way.
'어른들을' serves as the object of the verb '따라야 합니다', emphasizing who should be followed.