Answer:
3. Evidence showed that the island had been hit by a horrible tsunami.
Explanation:
The first sentence is a run-on, and a pretty bad one, at that. This sentence would've needed to be split into two in order to be grammatically correct.
<em>"The baker made gingerbread cookies. A gingerbread boy jumped off the cookie sheet and no one could catch it."</em>
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The second sentence also needs to be split into two to be correct.
<em>The Mexican Free-Tailed bat is a type of bat that lives in big groups. A famous group lives under a bridge in Austin, Texas.</em>
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Sentence 4 needs to be separated with a comma or apostrophe.
<em>"It was a time of extreme drought ; many trees died and many animals suffered." </em>
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Sentence 3 is the only one that's fine as-is.
