Answer:
1. They keep casts to preserve the real fossils.
2. Maybe someone would steal a fossil and sell it on the dark web?
3. They keep casts to keep the real fossils in prime condition, by that I mean like undamaged.
1. Well developped offspring, and portable baby food despencing. Mamalian young are generally quite well developed when they are born, and the parent does not need to find any specific types of food for the new born since the mother already provides te perfect nutrition.
2. Internal heating allows mammals to remain quick and active in cold climates.
3. Fur is really effective and cheap to produce.
Desert because they are always dry, but in the colder months they can get cold
Try playing a game with the dolphin and see how quickly the game stimulates the dolphins brain and see if the dolphin gets used to or gets the hang of that game... I mean isnt how all animals are taught? Lol
