It’s important because diversity makes the world better. if the media was just consisted of one entire race or nationality there would be just one viewpoint.
The structure of above sentence is complex.
Answer: Option A
<u>Explanation:</u>
When a sentence consists one independent clause and one or more subordinate clause is said to be a complex sentence. In the above sentence, ''Sheila stopped to help the puppy'' is the independent clause which can form a simple sentence by itself. ''Although it was raining and who had fallen into the deep hole'' are the dependent clauses that does not form a simple sentence by itself.
These two clauses connected by relative pronouns or adverbs are the examples of complex sentences. We can combine them together to get a complex sentence.