Waves move fastest in low temperatures ?

FALSE

It moves fast at high temperatures

Explanation:

On increasing the temperature of the medium the vibration of medium molecules will be more also the amplitude of the vibration will increase.

So We can say that the disturbance that is carried by the waves can be easily transmitted through the medium when it is passed through a medium at high temperature.

In all three medium i.e. solid liquid or gas the energy or disturbance can be carried faster when temperature is increased

So above statement is NOT true that waves moves fastest in low temperature but the correct statement should be like this that waves moves fastest at highest possible temperature of the given medium