Answer:
B. pollution
Explanation:
Pollution is related to the environment, not economic downturn.
<span>This suggests that Trey has not yet developed a legitimate understanding of the permanency of tangible objects. This can be evidenced by the fact that Trey lost interest in the ball once it was no longer in his range of sight. He has not yet learned that the object does not just disappear if he is unable to see it.</span>
George Miller was an important catalyst for the COGNITIVE revolution in psychology.
Cognitive psychology is the scientific study of the mind and the mental functions, including learning, memory, attention, perception, reasoning, language, etc. <span />
well just to let you know ''HINT'' OPEC is oil.