Q: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores. Which student studied less about keystone species?
A: Kim

Q: Two neighboring towns, Pine town and Willow town, used different types of woods for lumber et al. Willow town used hardwoods, while Pine town used softwoods. Which town used fewer conifers for lumber?
A: Willow

Q: Ben and Mike both studied earthquakes, while Mike was more interested specifically in mantle melting and related phenomena. Which person didn't learn about sediment subduction?
A: Ben

Q: Two countries had big rivers discharging in the same ocean. Finland was very aware of environmental pollution and acted accordingly, while Russian practiced conventional agriculture and used fertilizers. Which country caused more human waste to reach into the ocean?
A:
Russia