Final answer:
a. The title Sonnet 43 originates from a collection of 44 sonnets written by Elizabeth Barrett Browning to her fiancé, Robert Browning, known as Sonnets from the Portuguese.
Step-by-step explanation:
a. The title Sonnet 43 comes from a collection of 44 sonnets dedicated to the poet's fiancé, which is part of Elizabeth Barrett Browning's sequence of poems titled Sonnets from the Portuguese.
These sonnets chronicle the development of her relationship with her future husband, poet Robert Browning, and are some of the most famous and beloved love poems in the English language. Sonnet 43 is particularly well known for its opening line, "How do I love thee? Let me count the ways."
Within the wider context of poetry, a sonnet is indeed a sophisticated form that consists of fourteen lines and often adheres to a particular rhyme scheme and metrical pattern, such as the Petrarchan, Spenserian, or Shakespearian forms.
Among these, the Shakespearian sonnet's rhyme scheme is abab, cdcd, efef, gg, presenting a structured form which invites the poet to explore themes such as love, beauty, politics, and mortality. The final two lines of a Shakespearian sonnet typically form a couplet, offering a conclusion or a twist in the narrative.