We do our homework at the table. what is principal part?

We do our homework is the principal part because it includes the subject, and verb.

Explanation:

All right in this composed sentence, we can observe something pretty clear. It starts with the subject and it is followed by the verb, then it goes on with a possessive adjective. Followed by an object involved in the action. Therefore we complement it with the location in which we carry on the action. This is a specification of what we are doing here, therefore because we only provide further detail to amplify the reach of knowledge and data of the action it is the second part.

you need need more details so we can understand what your asking us.

as for symbolic actions, the narrator's tearing down the wallpaper in an attempt to find the "woman" in the wallpaper represents her struggle to retain or regain her sanity.   the wallpaper has been part of her confinement and by her tearing it down, she is freeing herself from that confinement.