Sentence:  The second or highest grade consists of the <WSD>Angels</WSD> or Bishops of Churches. Each Church has its <WSD>Angel</WSD>, who has (1) the higher supervision and care of all the flock, (2) the supervision and care of the Priests under him, and (3) the care of the Church itself. 
Meaning of the word marked with <WSD> tags:  An official (a bishop, or sometimes a minister) who heads a Christian church, especially a (Catholic Apostolic church).