Answer:
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Step-by-step explanation:
The phrase from the preamble that best aligns with the idea of protecting freedoms for current and future generations is:
"and secure the blessings of liberty to ourselves and our posterity."
This phrase emphasizes the desire to ensure not only the current generation's liberty but also to secure it for future generations (posterity). It reflects the framers' intention to establish a government that safeguards individual freedoms and rights not just in the present but for the welfare of future citizens as well.