All these sentences use the word "so" correctly except "Flies breathe through holes in
<span> their abdomen or thorax, so do bees.</span>" So should either begin a new sentence of be preceded by "and".
The inclusion of reputable sources and specific facts would best strengthen the author's main argument because it would offer factual proof instead of just the author's opinion on the matter.
It is in the present participle.
Because the rain will get in to you eyes if you are outside and cant run from the tornado of hold on to something that wont fly away and will cause leaks in your tornado shellter
