Explain how President Obama used technology as part of his campaign strategy during the 2008 presidential election

They used analytics, social media and big data.

Explanation:

During the elections in 2008, Obama understood the importance and impact that the internet and technology can have on the results and they used social media to reach as many people as they can, informing them and trying to get their votes. They also used analytics science and big data to understand people's behaviours and needs, enabling them to direct their advertisements and movements online and on social media according to that.

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food chain i would say only because there is competition on getting food and survival