10.5.7 Which of the following should your essay contain? A your opinion B a description C viewpoints to support your opinion D only arguments against the topic E an introduction and a conclusion

Sharks (lat. Selachii) are a superorder of cartilaginous fish (Chondrichthyes), belonging to the subclass of elasmobranchii and having the following distinctive features: an elongated body of a more or less torpedo-shaped shape, a large heterocercal caudal fin, usually many sharp teeth on each jaw.

The Russian word "shark" comes from the Old Norse "hákall". The most ancient representatives already existed about 450-420 million years ago.

More than 526 species of sharks are known: from the deep-sea shallow Etmopterus perryi, only 17 centimeters long, to the whale shark (Rhincodon typus) - the largest fish (its length reaches 20 meters). Representatives of the superorder are widely distributed in the seas and oceans, from the surface to a depth of more than 2000 meters. They mostly live in sea water, but some species can also live in fresh water. Most sharks are so-called real predators, but 3 species - whale, giant and largemouth sharks - filter feeders, they feed on plankton, squid and small fish.

This cartoon about the adventures of a boy whose name is a dipper and his twin twins .They arrived in the town of Gravity Falls, California on vacation to their great uncle.Once a dipper, developing indexes in the forest, found a diary.The author of this diary disappeared many years ago. This is the beginning of all his adventures.They with the sister and friends saw the Zombies and ghosts and even small little men who actually were revived balls for a golf!To learn more about this, it is better to watch a cartoon or read a book.