Many animals influence and contribute to ecosystem services. As pollinators, how do bees ultimately contribute to direct ecosystem services

enjoying a hike in a National Park
apples eaten by people that grew from a tree
a plant photosynthesizing and emitting oxygen into the atmosphere
none of these

Bees contribute to direct ecosystem services as pollinators by helping plants reproduce. When bees collect nectar and pollen from flowers, they inadvertently transfer pollen from the male part of the flower to the female part, resulting in fertilization and the production of seeds and fruits. This process is crucial for the reproduction of many plant species, including those that produce food for humans and animals like the apples mentioned in the question. Therefore, bees indirectly contribute to the enjoyment of a hike in a National Park and the production of food from plants. The correct answer is: apples eaten by people that grew from a tree.