निम्नलिखित वाक्य के वाच्य (Voice) की पहचान कीजिए: 'Simultaneously, the rapid spread of revolutionary ideas across the continent was facilitated by Johannes Gutenberg's invention of the printing press.'

Change the following active voice sentence into passive voice: 'My father writes a story.'

Identify the voice of the following sentence: 'This thermal stability is maintained by a massive sunshield.'

Identify the voice of the following sentence: 'These traditions are often transmitted through generations.'