Final answer:
The cultural ecosystem service of forests is the spiritual and recreational value they provide.
Step-by-step explanation:
The cultural ecosystem service of forests is the spiritual and recreational value they provide. Forests are often seen as peaceful and beautiful places where people can go to relax, connect with nature, and engage in recreational activities such as hiking, camping, and birdwatching. Forests also hold cultural and spiritual significance for many indigenous communities around the world.