Answer: This is an observational study
Explanation:
What is an observational study?
Observational studies are those studies in which a researcher will set their time apart to observe a particular action without interrupting it or changing it ; they observe it as it is without introducing anything or reducing anything from it.
A researcher above is just watching how people walk from or to the airplane without him making any interventions.
Answer:
"You should never drive where you cannot see"
Explanation:
According to my research on driving safety, I can say that based on the information provided within the question it can be said that the missing statement would be "You should never drive where you cannot see". There are many situations such as "you should never drive under the influence of alchohol or drugs" but since the rest of the statements indicate on road conditions I would say that the first one is the answer.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
Answer:
Two
Explanation:
The Constitution prescribes that the Senate be composed of two senators from each State.
Answer:
You need to tell us which countries your referring to
