Why would some people describe Carl Sandburg as a "regional" poet? WILL MARK BRAINLIEST

He wanted to celebrate America as a whole in all of his works.
He never left his home state during his lifetime.
He only dedicated part of his career to poetry.
He wrote mostly about the Midwest and its people.

Read the poem from "my brothers’ flying machine: orville, wilbur, and me" by jane yolen first before answering these questions. part a: how do lines 1–23 most support a theme of the poem? question 1 options: a by describing how heavy the constructed plane would be b by detailing the commitment that went into the first flight c by showing how tunnels were used to make test flights d by illustrating the challenges of fueling the plane read the poem from "my brothers’ flying machine: orville, wilbur, and me" by jane yolen first before answering these questions. part b which evidence from the poem best supports the answer to part a (question 1)? question 2 options: a “now they worked dawn to dusk / so absorbed in what they were doing,” (lines 1–2) b “they learned about lift and drag.” (line 9) c “gasoline was gravity-fed into the engine” (line 19) d “over six hundred pounds of aeroplane— / it could not be assembled whole in our shop.” (lines 22–23)