Answer: D. changes direction
Explanation: A lens works by refraction: it bends light rays as they pass through it so they change direction.
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The lines going up and down are longitude and the lines going from side to side are latitude.
Answer:
True
In a free market, competition determines price, and so companies will compete with one another to offer the lowest prices.
If it's asking a combination of culture traits in a culture group then the answer is culture complex.