They may design and perform an experiment to try to answer their question and test their hypothesis. From the results of their experiment, scientists draw conclusions.
Thats the way scientists think.
The principal or
The security guard it holds everything together or the foundation of the school
I don't know your chart, but I can provide some data:
Niger's migration rate is -0.5/1000 people: this migration rate is negative, which means that more people leave Niger than enter it.
Italy's migration rate is 4.2/1000 people: this means that more people enter Italy and settle there than leave it.
