Read the following poem, "A Birthday" by Christina Rossetti and answer the question below. My heart is like a singing bird Whose nest is a weathered shoot; My heart is like an apple-tree Whose boughs are bent with thick-set fruit; My heart is like a rainbow shell That paddles in a halcyon [peaceful] sea; My heart is gladder than all these Because my love is come to me. QUESTION: What tone do the details of the poem convey