Problem: Two different rivers were stocked with adult fish. Red river had a lower fish population because the fish had hardly reproduced naturally. Black river had doubled it's fish population in two years because they reproduced naturally. Which of the two rivers had more fish reproduce sexually?

A: Black

Problem: Two teams of athletes were attending a competition. Brown team arrived in time and started their warm up, but Green team arrived late and skipped their warm up so they experienced some people getting injured. Which team experienced fewer muscle injuries?

A: Brown

Problem: Burr township is situated on the western side of the ridge, at a lower altitude, and is experiencing atmospheric convection every once in a while, while Jolt township, on the eastern side, has a less windy, less cloudy environment and is situated at a higher altitude. Which township is experiencing fewer tornadoes?

A: Jolt

Problem: Keith is a physician in a local hospital. He is treating a patient with respiratory problem. He looked at two different states of the patient's diaphragm, state A and state B. In state A the the diaphragm contracted, but in state B the diaphragm relaxed. He now needs to figure out other phenomena related to this. When would the ribcage expand, state A or state B?

A:
state A