Answer:
mechanical solidarity
Explanation:
Mechanical solidarity was developed in Emile Durkheim theory if development of society. Durkheim explains that mechanical solidarity is seen in less technologically developed societies or hunting and gathering societies whereby there is togetherness as a result of shared beliefs, customs, traditions or experiences. This solidarity functions like some sort of internal conscience among 10th else individuals that causes cooperation among them. Mechanical solidarity is opposed to organic solidarity in Durkheim's theory.
Scientists should definitely use evidence - and they collect this evidence though especially designed experiments. Based on their data and assumptions they build models which they then test, but they can base their conclusions based on the models too.
What they should not do is based the conclusions on opinions, because opinions are not imparcial- they can state them as opinions, but not as conclusions.
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Aryans came to India, with the British, in the 19th century. Many British Indologists and a German one, created the Aryan invasion theory, by giving racist meaning to a Sanskrit word 'arya' which meant nobleman, at a time when race was used to justify colonialism. So, Aryans entered India, not by land, not by sea, nor did they land from the sky. They came through the textbook route.
