The answer is the measure of sound
Answer: "It's a dog" and "Who's that?"
Explanation:
The comma is putting together and shortening 'it is' and 'who is'.
Five Poets have recited poems at US presidential inaugurations. Robert frost read "The gift outright" at the inauguration of John F. Kennedy. Maya Angelou<span> read "</span>On the Pulse of Morning" at Bill Clinton's inauguration. Miller Williams<span> read "</span>Of History and Hope" at Bill Clinton's second inauguration. Elizabeth Alexander read "Praise Song for the Day" at Barack Obama's first inauguration. <span>Richard Blanco read "One Today" at Barack Obama's second inaugural.</span>
In this sentence, inquisitive means interested or curious in something
Hope this helps :)