Question

In sonata form, which section builds s strong conflict between a new key and the tonic key?

Answer 1

The exposition section builds a strong conflict between new key and the tonic key, since it is where the themes are first presented. Moreover, the three parts of sonata form are the exposition, development, and recapitulation, so coda is definitely incorrect

Answer 2

Exposition
First section of a sonata-form movement, which sets up a strong conflict between the tonic key and the new key; and between the first theme and the second theme.