Complex sentence: In an example with wolves and caribou, as the number of caribou increases the number of caribou kills per wolf also increases, however, the higher the density of caribou, the less increasing caribou density increases the number of kills per wolf.
Split into simpler sentences: In an example with wolves and caribou, as the number of caribou increases the number of caribou kills per wolf also increases. The higher the density of caribou, however, the less increasing caribou density increases the number of kills per wolf.