Answer:
D. Fruit trees, birds/monkeys, tigers
Step-by-step explanation:
Fruit trees are the primary producers and produce fruits and other plant parts as food for birds. Monkeys are omnivorous and derive nutrition from eggs of birds or fruits, seeds and other parts of the plant. Tigers are top consumers and are carnivores as they feed on monkeys and even birds. Therefore, the given ecosystem may have the following food chain:
Fruit trees (first trophic level and producers)----> birds /monkeys (second trophic level and first consumers)---> tigers (third trophic level and top consumers).