I think Mr. Underwood compared Tom Robinson to mockingbird in the book to kill a mockingbird because Mr. Underwood says it is a sin to kill cripples, which is similar to Atticus saying that it is a sin to kill mockingbird, making Tom Robinson a symbolic Mockingbird.
* Hope this helps!!! Mark me brainliest :)
<span>"In the 1840s the Duchess of Bedford introduces the ritual of afternoon tea, because by this time dinner had become so late, seven-thirty to eight o'clock . . ."</span>