Read the extract below and answer the question
A : Save thee, friend and thy music. Dost thou live by thy labor?
B : No, sir, I live by the church.
A : Art thou a churchman?
B : No such matter, sir, I do live by the church, for I do live at my hose, and my house doth stand by the church.
(Act 3 Sc 1.)
The phrase ''live by'' as used in the extract is an example of