Answer:
Predator-Prey Relationship
Explanation:
If the extinction of one of the species leads to an increase in the population of the other species, then the relationship must be a predator-prey relationship, because the now-extinct species was keeping the now-increasing population of the other species in check.
The answer would be evaporation
Both magnets and electro magnetics
Answer: The answer is nuclear energy
Explanation: Nuclear energy is the energy that is gained when atoms split.