Answer:
same elements in their structure
Explanation:
The first one is done alone the second is done with someone else
Since they realize there is a tsunami there have an emergency plan, emergency equipment and might have escaped.
Answer:
In a cross-sectional study that compares IQ scores, the difference in IQ scores of 25-year-olds and 45-year-olds is due to differences in their life experiences
Explanation:
A cross sectional research is a research that studies a population at a specific point in time. e.g. what is the effect of smoking on the health of males between the ages of 18 - 45 years in 2020