Final answer:
People worldwide supported Solidarity because it championed universal human rights and social justice, unifying diverse groups with a common goal of freedom and democratic governance.
Step-by-step explanation:
The strong global support for Solidarity stems from the movement's commitment to universal human rights and social justice. This movement was not just a struggle for national independence or economic reforms in Poland, but its principles echoed a universal longing for freedom, dignity, and democratic governance. At its core, Solidarity brought together workers from diverse backgrounds with a common purpose, exemplifying the power of unity in diversity, much like the piece of art you've described. The answer to why people all over the world showed such strong support for Solidarity is option (a) The movement championed universal human rights and social justice.