Maintaining a stand of pine trees is NOT an example of a cultural trait.
Cultural traits are the particular practices, beliefs, behaviors, or material objects that a group of people share and transmit over generations and are characteristic of the group or society. Examples of cultural traits may include wearing colorful clothing, terracing land for crops, building bridges across mountains, and playing sports such as soccer.
Maintaining a stand of pine trees may relate to environmental conservation practices or landscaping preferences, but it is not a specific cultural trait of any particular group or society.