Pa help po plsss need to po ngayun salamat...

Answer:
People
or
Objects
Activities
(they could be having a)
B.
They could be having a silent lecture, or the teacher is scolding the students, or the teacher is narrating a story.
C.
The distance of the teacher is quite a little bit close to her students, it's maybe because this is a class of kindergartners or this is mainly how they are seated.