The major part of the Petrarch sonnet is the

A Petrarchan sonnet consists of 14 lines and is typically divided into two parts: an octave (8 lines) and a sestet (6 lines). The major part of the Petrarchan sonnet is usually considered to be the sestet, as it typically provides a resolution or conclusion to the ideas presented in the octave. The octave usually sets up a problem or situation, while the sestet often offers a solution or reflects on the situation in a new way. However, both the octave and sestet are important parts of the sonnet, and together they create a complex and unified whole.