Final answer:
The life lesson of The Lorax is to be an advocate for those who can't defend themselves, particularly the environment.
Step-by-step explanation:
The life lesson of The Lorax is that you should always be an advocate for those who can't defend themselves. The Lorax is a story that teaches the importance of speaking up for the environment and protecting nature from harm. Through the character of the Lorax, Dr. Seuss emphasizes the responsibility we have to care for the earth and preserve its resources for future generations.
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