Question

some of the best discoveries in cooking come from improvisation or even mistakes rather than careful planning. the popular origin story of the chocolate chip cookie shows how one small change can lead to something completely new.
there are various legends about how ruth wakefield invented one of the most popular cookies in the u.s. one account states that in 1938, she encountered a problem baking in her restaurant. her cookie recipe needed baker’s chocolate, which usually melts into the dough. when she found she had run out, she decided to use a different type of chocolate. she cut a semisweet chocolate bar into small pieces that she mixed into the batter instead of melting it as the recipe instructed.
the story goes that when the cookies came out of the oven, something unexpected had happened. the chocolate pieces kept their shape and created small pools of melted chocolate that hardened as the cookies cooled. while other bakers had tried using bits of chocolate in cookies before, wakefield’s method was different. she found the perfect balance of chocolate and dough: the classic chocolate chip cookie.
how does the detail in bold help shape the central idea of the passage?
it explains how ruth wakefield’s foresight and careful experimentation led to the creation of a now - famous recipe.
it highlights the fact that the chocolate stayed separate from the dough as it cooled, indicating that it did not affect the taste of the batter.
it shows the unexpected outcome of her experiment, which highlights how improvisation can lead to important discoveries.
it demonstrates that unexpected results can occasionally create new things, outcomes are not always reliable.

Explanation:

The passage's central idea is that great cooking discoveries can come from improvisation/mistakes instead of careful planning. The bold detail describes the unexpected result of Wakefield's improvisation (using chopped chocolate instead of melted), which directly shows how this unplanned choice created the classic chocolate chip cookie, supporting the core idea about improvisation leading to key discoveries.

Answer:

It shows the unexpected outcome of her experiment, which highlights how improvisation can lead to important discoveries.