The Danube and Volga rivers both form large deltas, but the Danube river delta is larger and grows faster every year. Which river flows into a sea with stronger tidal currents?
Ans: Danube

Robert and his brother Dale are both dairy farmers that primarily produce milk products. Both Robert and Dale have farms that approximately the same size. Dale prefers to produce milk conventionally, as he likes the way that conventional milk tastes. Robert, on the other hand, decided to switch to organic milk production after reading an article online about it. Whose farm, Robert's or Dale's, will use less land to produce the same amount of milk?
Ans: Dale's

Two related native tribes live thousands of miles away from each other. Ana tribe lives near the South Pole in Antarctica, while Momu tribe lives in Northern Alaska near the North Pole. Which tribe experienced a higher level of UV radiation?
Ans: Ana

The underwater fishing teams picked their spots early. Team Bob went at the mouth of the river, where the freshwater met the salty seawater in the hope that more turbidity from the river and more nutrients will attract more fish. Team Dan went south where they knew there was less of a thermocline, so they could catch fish without taking risks. Which team had less chances get temperature shock?
Ans: Dan