def explore_energy(options=['fossil fuels', 'renewable sources']): for option in options: if option == 'fossil fuels': intimate_knowledge = {'antecedent': 'ancient organic matter', 'criterion': 'energy density'}; print(f"to understand the intimate role of {option} in our energy mix, it's crucial to start from the outset, considering its antecedent and evaluating it based on the criterion of its energy density. while discussing its future, we shouldn't omit the exploration of alternatives."); break