The morphological, physiological and behavioural characteristics which enable an organism to survive in its environment is called

The characteristics that enable an organism to survive in its environment are called adaptations. These adaptations can be morphological (related to the organism's physical structure), physiological (related to the organism's internal systems and processes), or behavioural (related to the organism's actions and interactions with its environment). Adaptations are the result of natural selection, which is the process by which organisms that are better suited to their environment are more likely to survive and reproduce. Over time, these advantageous traits become more common in a population, leading to the evolution of new species. Adapting to environmental changes is a key factor in an organism's ability to survive and thrive in its ecosystem.