A major cause of the loss of smaller separate cultures and languages is... a
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b
government regulations.
preservation efforts.
cultural assimilation.
globalization.
C
d

cultural assimilation.

Explanation:

The major cause of the loss of smaller separate cultures and languages is cultural assimilation.

Cultural assimilation entails the absorption of a minority culture into a larger one.

Culture is a the way of life of a people and this encompasses language, fashion, cuisines etc.

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.