Final answer:
Redox reactions involve gaining and losing electrons, with examples from everyday life like car engine combustion and sugar metabolism.
Explanation:
Redox reactions involve the process where one element or compound gains electrons (reduced) while another loses electrons (oxidized). An example of a redox reaction is the combustion in a car engine where hydrocarbons in the fuel are oxidized to carbon dioxide and water while oxygen is reduced to water. Another common example is the metabolism of sugars to CO₂, which is a redox reaction that stores energy in the form of ATP.
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