What is the fourth element in rune factory?

In "Rune Factory," the fourth main installment, players explore the vibrant world of Selphia, where they can engage in farming, crafting, and combat. The game introduces new features like the ability to ride monsters, expanded character interactions, and a more intricate storyline. Players also experience a blend of role-playing elements with life simulation, enhancing the overall gameplay experience. The game emphasizes relationships with villagers and includes marriage options, adding depth to character development.