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Some of the earliest forms of customer service is goods and services would come to you. Peddlers went to houses, doctors did hours calls...etc
Weber (Weber's Law)
Not 100% sure though. Hope this helps.
Answer:
Journalism, Performing Arts, Telecommunications
In this manner, matter moves<span> through the ecosystem as organisms in one trophic level provide nutrients for others. ... The cycle begins anew when plants use these nutrients like nitrogen to grow, while photosynthesis enables them to use energy to make food.
</span>One of the ways that nature recycles matter<span> is</span>through the carbon cycle. ... There are two ways forcarbon<span> to be removed from the atmosphere. The first is </span>through<span> photosynthesis, where plants take in CO2, water and sunlight to create sugars for energy, and oxygen gas emerges as a by-product.
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Sound waves need to travel through<span> a medium such as a </span>solid<span>, </span>liquid<span>, or </span>gas<span>. The sound waves </span>move through<span> each of these mediums by vibrating the molecules in the </span>matter<span>. The molecules in </span>solids<span> are packed very tightly. ... Sound </span>travels<span> about four times faster and farther in water than it </span>does<span> in air.</span>
