The characteristics of ecosystems include diversity, adaptiveness, interconnectedness, resilience, regenerative capacity and symbiosis. The responsiveness of the social environment will determine the adaptiveness of emotional approach coping. Feedback regulation of the heartbeat provides further adaptiveness to the running eventualities of physical exertion. The adaptiveness of deprecating humor in social interactions is a point of interest among researchers. This is due to their high adaptiveness to changing habitat conditions. We can measure adaptiveness by assessing the effort (costs) required. As systems evolve, their adaptiveness tends to increase, and therefore also their knowledge or intelligence.