Answered

Extremely high temperatures are needed for fusion reactors to function efficiently. What state of matter is most common at these temperatures?

plasma, gas, liquid, solid

Sagot :

AnneCviz
Plasma.

(Stars are balls of plasma, i.e. they have extremely high temp)

(Trivia: This is why it is very difficult to generate sustainable fusion reactors since these occur at temp ≈ 10million ºC)