Is once we were inside the first compartment, Captain Nemo closed this door and pressed a button active or passive

This question is about "I Hear America Singing"

The structure of the poem suggests that all types of work are important to American industry, including housework.

Explanation:

In "I Hear America Singing, the poet shows the importance of work in the country. For this he stretches the poem in lines that show different types of work, but that all workers sing the same song. With that, the poet means that everyone jobs are important for the development of the country and that everyone seeks the same goals and that, in a way, are united to each other, even domestic work is interconnected, showing that the country needs all workers committed to growth.