What is the primary factor that defines K-selected species?

The primary factor that defines K-selected species is their adaptation to a stable environment where they typically produce fewer offspring. K-selected species, such as elephants and humans, invest significantly in the care and nurturing of their young, leading to a higher survival rate for those offspring. This strategy is advantageous in stable environments where competition for resources is high and where individuals are more likely to survive to adulthood if they receive proper care and resources.

In contrast to r-selected species, which focus on rapid reproduction and producing many offspring with a lower chance of survival, K-selected species emphasize quality over quantity in offspring production. This investment in fewer young instead of a high number is particularly beneficial in stable environments where conditions do not fluctuate significantly, allowing for enhanced survival through parental care and resource allocation.