Identify the kinds of agreement or disagreement most probably exhibited by the following pairs:

a. I know of no pursuit in which more real and important services can be rendered to any country than by improving its agriculture, its breed of useful animals, and other branches of a husbands man’s cares.
b. With the introduction of agriculture mankind entered upon a long period of meanness, misery, and madness, from which they are only now being freed by the beneficent operations of the machine.