<span>The Greeks originally founded Marseilles</span>
<span>It was a crossroads for trade.
Hope this helped! :)
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This is one of those questions where only you can answer it. List a few things that have changed due to the virus and work from there. For example, you could say how your parents aren’t going to work or how you can’t see your friends.
Answer:
While experimenting researcher can record, test or control the group and while observational study researcher can't do that
Explanation:
An experimental study can be under the control of someone who is doing the research or experiment.
The researcher can also manipulate the experiment and in the observational study, there are no experiments.
The observational study requires the research observing of something, this observing includes what happened in the past, what is saw in the past and what is now.
