Answer: option d. the Missouri and Ohio Rivers.
Explanation:
During the last ice age, there was reduction in the amount of solar radiation that hits the surface of the erth. As a result of this, some continents experienced a glacial growth and cold climates and the geography was also affected.
North America was covered by ice and the mid-western North America, the southern boundary of the north polar ice cap during past ice ages is marked by Missouri and Ohio Rivers.
Quaternary period<span>, Cenozoic </span>era<span>, and Phanerozoic </span>eon<span>.</span>
In the question the option that tells us the weakness of the sampling technique is that Samples were taken from both dark and bright lunar areas instead of concentrating on one area
<h3>What is a sampling technique?</h3>
The sampling technique can be defined as the name of the technique that helps in the identification of the specific process by which the entities that would be used in a sample has been chosen.
This is the way that the subset of a population can be used to make generalizations about the entire population that is existent in the study.
Hence we can ay that In the question the option that tells us the weakness of the sampling technique is that Samples were taken from both dark and bright lunar areas instead of concentrating on one area
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Oceania, which is also known as Oceanica, is a region that is in the center of islands in the tropical Pacific Ocean. From the given choices, the physical geography that best describes Oceania is that is isolated from the rest of the world. The answer is letter D.