I am a graduate of the Conservatory of Music majoring in pop singing. Maybe I can help you. Do you mean musical structure or singing? If it is structural, as you said in paragraphs A and B, this is the structure that most popular songs follow. The chorus is the climax after the singing of paragraphs A and B and before the end of the song. There are also preludes and interludes (pure music between paragraphs A and B). After the second chorus, there is a melody rhythm completely different from paragraphs A and B, and the lyrics here are generally the most touching or summative of the whole song. Generally, it is to give the song a better atmosphere, and finally introduce a chorus. There are also some songs that have a pre-chorus in front of the chorus, which is equivalent to a small chorus, but the melody may be different, and it is also to better contrast the atmosphere of the chorus.
If it's singing, it's too much, but pop music generally talks about solo (if it involves dance, solo) and piano solo. There is accapella (cappella, that is, without any musical instruments, only human voices are used to imitate the sounds of various musical instruments). Harmony (all songs have a main theme, but this song has no three-dimensional sense only by a plain melody, so it will be accompanied by harmony when composing, and the popular explanation is "harmony")
There are too many technical terms in this field. Most music bookstores sell this kind of books. You can go and have a look. Finally, I would like to remind you that in formal occasions (such as competitions, concerts and academic reports of conservatories), "pop music" is rarely mentioned, but "pop music", "pop songs" and "pop singing" and so on.
I typed it completely by myself. I hope I can help you!