Bond with nature in this charming expansion pack means...

We’ve also been speculating about that one here:

https://forums.thesims.com/en_US/discussion/989852/bond-with-nature-in-this-charming-expansion-pack-means#latest

And here:

https://forums.thesims.com/en_US/discussion/989819/news-tomorow-17th-may#latest