Answer:
Lines 19-21 suggest that the speaker is confused about the next step to take in life and needs guidance of her mother.
Explanation:
"Hanging Fire" is a poem about a 14-year-old teenage girl who expresses a myriad of emotions - excitement, enthusiasm, doubts, fears, anxieties - on various topical issues in her life.
In lines 19-21, she says that "she has plenty to do yet nothing to do" expressing her desire to launch out, explore and do things in life yet is held back by our fear or worry of the unknown. She is confused on the next steps to take as her teenage years unfold.
Meanwhile her mother who is supposed to be her guide through this phase of life is strangely absent, locked up behind closed doors in the bedroom, oblivious of the life challenges her daughter is going through
