Fact 1: Planting trees has a positive impact on an ecosystem. Fact 2: Indiana forests are complex ecosystems. Given the two facts above, what has a positive impact on forests?
Choices:
A). genetic diversity.
B). some invertebrates.
C). planting trees.
D). food and shelter.
E). lowered energy cost.
F). extinction of species.
G). logging.
H). canopy removal.
Answer:
C).