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.
The main idea of the paragraph would be the penguins camouflage and feathers help them in their survival
3 supporting facts would be: it makes them hard to see in the ocean for predators, they blend with they sky, their feathers protects them while swimming and keeps them warm.
(this could be worded better but yeah, hope I could help!)
<span>The participial phrase barking in the yard modifies dog.
Ex: The kitten, sleeping peacefully on the window sill, never heard us enter the room.
Ex 2: Enchanted and enthralled, I stopped her constantly for details.
x
</span>
False..........................................
