Based on sentence fluency, transitions, and writing conventions, which conclusion most needs revision? Finally, scientists continue to argue their cases for and against a manned mission to Mars. However, an eventual mission seems likely.

In the end, there are logical pros and cons for a manned mission to Mars. It seems its more a matter of when it will happen than if it happens.

In conclusion, there are good arguments for and against a manned mission to Mars. But based on the evidence, it seems as though a manned mission is likely.

Overall, scientists continue to debate the pros and cons of a manned mission to Mars. Yet despite their indecision, it seems almost certain that a mission will happen.

The first one

Explanation:

It is not fluid or easily understandable.

and your question what topic are you in trouble with?

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation: