I don't think I can actually write you a paragraph, but a basic one consists of 5 sentences, so I will talk about a colony of penguins. Maybe I'll write a paragraph, but only for inspiration.
My answer (please customize to your needs):
Penguins are known throughout the world for their unique ability to swim underwater, but in some cases, this isn't just for fun. A colony of penguins always sticks (singular noun) together. Their survival depends on it. Generally, a group of male penguins helps (singular noun) keep newly-laid eggs warm, so that it doesn't result in a frozen shell, considering the habitat that they live in. Antartica is a cold place, temperatures ranging from -10 degrees Celcius to -60 degrees Celcius. Babies easily die in this climate, some not even beginning the hatching process before they are frozen. Accompanied with this dillema is food, which is hard to catch at times. Some species, such as the King Penguin, must rely on merely schools (plural noun) of Capelin, Herring, and other species of fish to stay alive. Another harsh aspect of this lifestyle are predators. Pods (plural noun) of Killer Whales, and herds (+bonus plural noun) of seals are always looking out for penguins waddling or swimming around. Many penguins dive into the ocean in search for food, and never return to the colony, being devoured by their predators. This shows that many species of penguins are more than just cute, cuddly creatures. They depend on each other, surviving in the ruthless climate of Antartica.
Hope this helps :)
-Your friendly neighborhod 8th Grader :)