Answer:
1 and 3 are subordinate
2 and 4 are independent
Explanation:
2 and 4 make up a sentence on their own whereas 1 and 3 need more details to be a full sentence.
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Answer: in contrast
Explanation:
Based on the information provided, the word or phrase that makes the transition to a different idea is "in contrast".
The phrase "in contrast" is used to explain the opposite of s particular thing. Since the first part of the text was analysing how communication was difficult in the olden days, after the use of the phrase, the opposite was actually discussed which was how communication is now easy nowadays.
In Osaka, Japan and it's in the 18th centenary
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