Presented above would be 'the relative ages of the rock layers'. While examining layers of rock, a geologist states that he sandstone is older than the limestone. The geologist has determined the relative ages of the rock layers.
<span>The tokens act as secondary reinforcers. A secondary reinforcer is one that is associated with a primary reinforcer. In order for the reinforcer to achieve its objective, the person has to learn the association between the primary and the secondary reinforcer. For example, money is a secondary reinforcer, food is a primary reinforcer. When we see the money we are motivated by the association we make; <span>buy food with the money.
I hope my answer can help you.
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The answer to the question stated above is: letter D The impact of European colonialism in the Americas similar to its impact on Africa from the fifteenth to eighteenth centuries is that Colonialism resulted in widespread deaths from disease in both locations.
It's about the problem of the divide between races, often invisible but sometimes physical.
