Yes pigs are amazing, they are intelligent lovable animals.
Yes
Chimpanzees Gorillas Orangutans Baboons Gibbons Monkeys Small toothed whales Dolphins Elephants Pigs
Because pigs are intelligent animals and prefer to travel by sea.
No. Pigs are pretty clever, but are not the "smartest species in the world". Border collies are probably more intelligent; certainly, they are capable of understanding more words than pigs are. I think that pigs get a reputation for "smartness" because pigs constantly exceed the farmer's low expectations of them. Further, you would need to define some measure of "brightest" in order to determine what the "brightest" species in the world would be. Would dolphins or whales qualify? They don't use tools - but they have nothing to use tools WITH. But based on the sizes of their brains, whales or elephants ought to be fairly intelligent, and in practice they are. More intelligent than humans? Difficult to say; we would need a better definition of "intelligence" than we have now in order to answer this question.
Humans, dolphins or pigs.
Pigs are not dogs. They are two different species.
The human species is known for its exceptional intelligence.
Some people keep them as pets, others farm them for food. Pigs are intelligent pets and tasty food.
Nope. All species of pigs can't fly.
Giraffs
Crows have been proven to be the most intelligent species of bird in existence as of 2011.