no it is not good to kill animal
yes.The megalodon is the biggest shark in the world and can grow to about 72 ft.It got extinct.
yes.
You can never really answer a question like this. You if sharks just got extinct, you don't know how that effect things. It effects other ocean lives. If sharks weren't around to eat fish, then they might over populate. And if they over populated, then that could cause problems. So never really want things to just disappear, because you don't how that can effect you, me, and everyone, and everything around you.
That would be a good thing. Salmonella is a bacteria that causes typhoid fever and food poisoning. About 30 people a year in the US die from salmonella infection.
Because most of those prehistoric creatures are completely wiped out... if humans had lived in the age of dinosaurs they would have been extinct too, unless in some way they were able to act like sharks, jellyfish, and all other animals that survived and... well... survive. if dinosaurs lived at the same time or after humans, and the dinosaurs got wiped out, we wouldn't be here would we? I rest my case.
no?
mammoths
If you are going to solo - then sharks are best. I personally would take a unicorn stallion - however if you don't have to required summoning level sharks will do fine. You will need high ish combat stats (look at a guide) - tip.it has good ones. Sharks are perfectly fine - fill a Beast of Burden as well if you haven't got unicorn and you should last a while.
some say that the weather got to cold for them so that's why they are extinct
The dodos got extinct because people hunted them and because people destroyed their habitat
Got eaten by sharks.
they got threatenened