Question: Which sentence best completes: \'The grass is always greener on the other side.\'?

Options:

1. People often envy what others have.
2. Grass needs regular maintenance.
3. Nature is beautiful.
4. Envy can lead to unhappiness.

Correct Answer: People often envy what others have.

Solution:

This idiom suggests that people often think others have it better than they do.