What's the difference betwwen life and live?

Hello there

What is the difference between life and lives ? How can use them?

Thank you in advance for your assistance

TOEFL listening lectures: What makes ‘The Canterbury Tales’ easier to understand?

When writing we use life as that of a single person; his life, her life, my life, its life.
We use lives for plurality. Their lives, our lives, the lives of others.