<span>a lasting change in behavior or mental process as the result of an experience ... Simple form of learningin which one stimulus calls forth the response that is usually called forth by another stimulus when twostimuli have been associated with each other. ... Which psychologist is most closely related to operant conditioning?</span><span>
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This is why it’s important to protect echo systems: Ecosystems are essential to our well-being and prosperity as they provide us with food, clean air and fresh water. Ecosystems also represent an exceptional source of outdoor recreation opportunities. The functions performed by ecosystems that increase our well-being are called ecosystem services.