Which of the following ecosystems is balanced? 50 oak trees, 30 squirrels, 15 owls 15 oak trees, 30 squirrels, 50 owls 50 oak trees, 30 squirrels, 30 owls 50 oak trees, 50 squirrels, 50 owls

The answer is A. Why is because the producer out numbers the  first consumer, and the first consumer out numbers the second consumer, and so fourth.

50 Oak trees, 30 squirrel, 15 owls

Explanation: In an ecosystem energy flows through different trophic levels. It goes from producers such as trees then primary consumers or herbivores and then secondary consumers or predators.

In every level, some energy is lost due to the biological processes of each group. So, in order to keep a balance, is important to have more energy available at lower levels, that is why there should be more individuals of Oak trees, then squirrel and finally owls