Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. ... Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy.
Thus, positive reinforcement occurs when a behavior is encouraged by rewards. If a child enjoys candy and cleaning the room is the desired behavior, the candy is a positive reinforcer (reward) because it is something that is given or added when the behavior occurs. This makes the behavior more likely to recur.
Answer:
True
According to UCMP Berkley, the only naturally occurring marsupial in the North America is the opossum (of different varieties).
Australia has a variety of marsupials, including the Tasmanian Devil, wombat, koala, and Red Kangaroo.
