<span>The
differing cultures that were embedded and mashed together could have
caused many disagreements based on the various views and rules in their
culture. The landscapes and nature surrounding Continental Europe which
included dense forests made travelling to faraway places hard. These are
only some of the condition that hindered the Roman Empire's expansion.</span>
That is not true
Because Kim Jong un's wife name is already Ri Sol-ju
Answer:
Internal validity
Explanation:
A research study finds that a group of participants who received relaxation training had lower exam anxiety scores than a group who did not receive training. However, the researcher suspects that the difference between groups may be caused by the fact that the participants in one group are generally smarter than those in the other. This study has a problem with internal validity.
Internal validity is a way of measuring if a research is sound or done the right way, it relate to how many confounding variable the researcher has in the experiment ( the less chance of confounding variable in that research, the higher its internal validity is). It reflect whether or not the research study will or are trustworthy and meaningful which help to validity how the study is conducted
