Read the text to answer the questions  no 1-3

     Snakes are reptiles (cold-blooded creatures). They belong to the same groups as lizards (the scaled group,squamata) but form a sub group of their own (Serpentes).
    Snakes have two legs but a long time ago they had claws to help them slither along. Snakes are not slimy. They are covered in scales which are just bumps on the skin. Their skin is hard and glossy to reduce friction as the snake slithers along the ground.
    Snakes often sun bathe on rock  in the warm weather. This is because snakes are cold-blooded, they need the sun warmth to heat their body up. Most snakes live in the country. Some types of snakes live in trees, some live in water,but most live on the ground in deserted rabbit burrows, in thick, long grass and in old logs.
    A snake's diet usually consists of frogs, lizards, and mice and other snakes. The anaconda can eat small crocodiles and even wild boars. Many snakes protect themselves with their fangs. Some snakes are protected by scaring their enemies away like Cobra. The flying snakes glides away from danger. Their ribs spread apart and the skin stretches out. Its technique is just like the sugar gliders. 

What does the text mostly talk about?