<span>One sort of confirmation that backings Wegener's theory is that fossils of a similar life form have been found on various mainlands. Since Wegener couldn't recognize the reason for mainland float, most geologists rejected his thought. Figure 13Alfred Wegener Although researchers dismisses his hypothesis, Wegener kept on gathering confirmation of mainland float and to refresh his book.</span>
By saying the study was low on external validity, the person would mean that the study is artificial and the results may not apply to real life.
<h3>What does the phrase "external validity" mean?</h3>
Its external validity refers to how well you can extend a study's findings to various subjects, settings, contexts, and measurements. Put another way, extrapolate the research's findings to a bigger picture.
<h3>How relevant is external validity?</h3>
Generalizations and knowledge that is transferable are desired because the aim of research is to discover connections and patterns that exist in the real world. This is why external validity is so important in research projects.
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<span>According to the national institutes of health, 65 percent of adult americans were overweight or obese in 2005, and 16 percent of american children were overweight.
The expert suspect that this number is caused by both the development of modern technologies that make the people tend to stay indoor with their gadgets rather than doing physical activities and the increase of junk food manufacturers.</span>
Answer:
D. physical boundary
Explanation:
Google the himalayas as borders in south east asian countries, you'll clearly see that they exist as physical boundaries between nations such as Nepal and China.
The French and Dutch exploration were explorers who went into the "new world" and made colonies for their countries back home.