By explaining problems and giving solutions! this is the best fit because the other two might make sense at a first glance, but only explaining problems and solutions would be an effective way to teach people how to set up an aquarium by giving them examples of what to do and what not to do whereas the others are just him talking about his aquarium.
Laughing,one long haired girl swished her hair and stood to read her poem, "Ode to Hair".
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d, a, a, hope this helps!
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Nani spied on my progress while she slathered a rich indian butter called ghee on the parathas and then flipped the bread to crisp perfection on both sides
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