As you said,” the original pony express route stopped many places for the rider to deliver the mail” and that is true!
Answer: The Huang He (Yellow River) Valley is the birthplace of the Chinese Civilization. The Yellow River is the second largest river in China and one of the longest river systems in the world. (hope this helps!)
Answer: Longitudinal research
Explanation:
Longitudinal research is the research study that is carried out by the researchers through observation technique. Information and sample are collected on the same project over a time period to observe any kind of change.
These researches can take huge amount of time such as may years to notice the alteration on the repeated observation.This study is carried out on the same individual or same group of individuals s the subject.
