The correct answer is A. This is the case of using comma before a coordinating conjunction <em>and</em> because it links two independent clauses. We can observe that there two parts of this full sentence and each part is independent from each other. Both of them have their own subject and verb. Therefore, we are using a comma before <em>and</em>.
Explanation:
Industrialisation should promote economic and social development in the following ways. Industrialisation means a country can produce a wider range of higher value goods – both for sale at home and for export abroad…. ... Industrialisation leads to urbanisation – as workers flock to factories to find work….
Answer:
Ground.
The blades ploughed gently into the soft <em>ground.</em>
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I hope this helped at all, sorry if it's incorrect.</em></h3>