what varieties are selected for this purpose??
Russian tortoises, spur-thighed tortoises, and red-eared sliders.
Turtle
Among the most popular are Russian tortoises, spur-thighed tortoises, and red-eared sliders. 

what is black-shouldered kite? It is a small raptor found in open habitat throughout Australia. how did it get it's name?? UNANSWERABLE do they face any threat? No what do they predate on? grasshoppers, rats, small reptiles, birds and rabbits. can you give a few examples for the third one? turtles, crocodilians, snakes, amphisbaenians, lizards and tuatara. how does the first one communicate to each other? They make various sounds when communicating. how is it used in the field of cosmetics? It's fat is a main ingredient in cosmetics which is marketed under the name "crema de tortuga". any other field where it is utilized?? Yes, in the culinary field. which country does it belong to? UNANSWERABLE are they used as pets? Yes,  small terrestrial and freshwater turtles, are kept as pets.
wiki:19582416
Turtle [SEP] As pets
Some states have other laws and regulations regarding possession of red-eared sliders as pets because they are looked upon as invasive species or pests where they are not native, but have been introduced through the pet trade. As of July 1, 2007, it is illegal in Florida to sell any wild type red-eared slider. Unusual color varieties such as albino and pastel red-eared sliders, which are derived from captive breeding, are still allowed for sale in that state.