The primary determinant of survival for organisms in changing climates is adaptability. Species that can quickly adjust their behaviors, reproductive strategies, or physiological traits in response to environmental changes are more likely to survive. This adaptability may involve phenotypic plasticity, where organisms exhibit different traits under varying conditions, or evolutionary changes over generations. Additionally, the ability to migrate to more favorable environments plays a crucial role. As climate conditions fluctuate, adaptability becomes essential for species to cope with stresses such as temperature shifts, habitat loss, and altered food availability.