Question: Fact 1: Harming an animal species causes that animal 's population to decrease.  Fact 2: If mortality is greater, then the population decreases.  Given the two facts above, what can cause a population decline?
Answer: mortality

Question: Fact 1: Water vapor condensing in clouds causes rain.  Fact 2: Rain is liquid precipitation.  Given the two facts above, what does water vapor condensing in clouds cause?
Answer: liquid precipitation

Question: Fact 1: Minerals are chemical elements that are essential for body processes.  Fact 2: Iron deficiency Anemia is associated with low levels of the mineral iron in the body.  Given the two facts above, what is a chemical element that is essential for body processes?
Answer:
iron