Answer:
body's
Explanation:
It actually would be bodies in that sentence.
Tom doesn't like attending church, he endures it, and is restive all through it. He has gone many times though, he knows the prayer so well that his ear detects any small change made by the clergyman from the regular route of the prayer. Tom doesn't like change because he considers any changes to the normal prayer unfair, and scoundrelly.
