Answer:
public school children had to get up early everyday to ride buses while observers say this case has the potential to be a blockbuster.
Answer: A systematic sampling method.
Explanation.
The purpose s to obtain data that closely resembles that of the entire population. Because this is impractical, random sampling is used.
After determining what a reasonable sample size will be, the size of the population is divided by the sample size to obtain a sampling interval.
The random sample is obtained from the population at the calculated sampling interval.
The best cause is erosion creating waves and pushing forward the line where the sand starts
