C is the answer to your question
Answer:
<em>reaction between silver and light create photograph</em>
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Explanation:
Photo journalism is so important because, especially with the changing technological state of our world, it’s a medium that can convey emotion the power of events or movements while also standing the test of time. It is also important because we live in a world with a lot of rumors and false media so photo journalism is a step in the direction of primary source and providing real evidence for events being reported on.