The reaction of an acid with a base, for example, results in the creation of a salt and water. Some, but not all, reactions can be reversed. See nuclear reaction. An action that results directly from or counteracts another action, especially the change in a body's motion as a result of a force applied to it.
Snakes are cold-blooded creatures, just like amphibians. When a certain animal is cold-blooded, it basically means that they are able to adapt their own internal temperature to that of their environment. When a snake is in a cool environment, their body temperature tends to drop rather quickly.
Cold-blooded reptiles, the 12 species of cobra and most of the 200 subspecies of the cobra family, are limited to the climates of the Eastern hemisphere. Like all snakes, cobras require warmth from their environment to maintain body heat, and are therefore found in a variety of regions in Africa and Asia, such as rain forests, semi-arid deserts and grasslands.