Spike tilted his head thoughtfully, and scribbled down some notes. "To understand the balance required across the system," Spike said, raising his hand. "Whether it be the fluctuations in predators and their prey, or seasonal weather patterns." He paused momentarily, to push his glasses back up his nose. "It's not that a plant from a hot climate can't live in a cooler one, you just need to maintain the balance - so watering it less often, for example, to account for the lack of rain and high rate of evaporation experienced in hot, arid climes." Of course, the obvious example here was the humble cactus; plenty of people kept them in the UK, where it decidedly wasn't hot most of the year round.

"You can also use this balance to understand adaptations of the same plant or animal to more than one environment."