Answer: 
is a single replacement reaction.
Explanation:
A chemical reaction in which one element of a compound is replaced by another element is called single replacement reaction.
For example,
Here, fluorine element in the compound 
is replaced by the element bromine.
Therefore, it is a single replacement reaction.
Thus, we can conclude that is a single replacement reaction.
What do you mean by ‘which of the following’? Without that I am not able to answer the question
Conduction is the movement of heat through a substance by the collision of molecules. At the place where the two object touch, the faster-moving molecules of the warmer object collide with the slower moving molecules of the cooler object.
