Final answer:
In the first stanza, Blake characterizes the lamb as innocent using word choices such as 'little' and 'meek'.
Step-by-step explanation:
In the first stanza of the poem, William Blake characterizes the lamb as innocent through his word choices. One example is the repetition of the word 'little' to emphasize the lamb's small and vulnerable nature, such as 'Little lamb' and 'Little Lamb, who made thee?'. Another example is the use of the word 'meek' to describe the lamb's gentle and submissive temperament. These word choices help to convey the idea of innocence associated with the lamb.