Answer: System
Explanation:
The question defined a system.
For future reference
Temperature is a measure of the average kinetic energy of molecules
Potential Energy is a measure of how much energy can be turned into kinetic energy (think a ball about to be dropped)
Matter is a term for stuff, everything is made of matter, atoms and molecules
Kinetic energy is energy in motion (think a falling object)
States are the position or form things are in, this is probably going to be used as "states of matter" (solids, liquids, gasses)
Conduction is the transfer of heat or electricity through two objects touching
Energy is "the ability to do work" think of energy like a general term for potential and kinetic energy, undefined if you ill
Hope this helps