Basic 4 Elemental Psionic Abilities Introduced

Pyro = Fire
Kenisis = Control/Move

Pyrkensis is an all time famous psionic ability. Also very dangerous.
Normally sub-elements are more powerful or ore dangerous than basic 4 but fire or pyrokenisis is definitely one fo the most infamous for being unpredictable, difficult to master and all around dangerous.

--

Geo = Earth/Ground
Kenisis = Control/Move

Geokensis isn't an all too dangerous ability until one get svery powerful and very skilled at it. The ability to control Earth. A weaker ability until again, one gets more skilled and higher up on the energy scales.

--

Hydro = Water
Kenisis = Control/Move

Hydrokenisis is an often more desired ability. It is to control water. This sbility can be dangerous but normally isn't as long as one doesn't push themselves to breaking point of which the ability gets way out of hand. But this is very difficult to do becuase hydrokenisis isn't to straining on the body. It is also rather easy to learn but somewhat difficult to truly master.

--

Aero = Air/Wind
Kenisis = Control/Move

Aerokenisis last but not least, is actually a safer ability than the others of the 4 basic elements, it has less chance of going out of control. Aerokenisis is very hard and time consuming though, to learn and master mostly because of the very few ways of doing so. This one is the control over air and wind.