Answer:
40 commands
He knows more than 40 commands. If Gabby falls, she can tell Ollie to “speak,” and he'll bark until help arrives. But Gabby says Ollie's cool tricks aren't even the best thing about her animal companion.
This is a literary technique known as conceit.
A conceit<span> is a kind of metaphor that compares two very different things in a remarkable and smart way. In this poem, the two opposing forces are light and darkness. But still, the author was able to equate them together in a surprising way to relate them both to the theme of beauty.</span>
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