What is the most appropriate correction if a poster heading differs in colour but sits over a very complex pattern?

Correct answer: Create a simple area behind the heading

The governing principle is contrast used for legibility and emphasis. A different hue may separate a heading from its background, but a complex pattern still creates competing lines, shapes and values that interrupt reading. Creating a calm, simple area behind the heading removes visual noise while preserving the heading’s distinction. Making it smaller or matching its value would weaken communication, while adding pattern would intensify the problem.