Answer:

bc=cb
It is an example of commutative property.
Explanation:
The given expression

By cross multiplying we can write given expression as

Commutative property: commutative property states that order does not matter.
In addition , commutative property
a+b=b+a
In multiplication , commutative property

We can write commutative property in multiplication
ab=ba
Therefore, by using commutative property then we get
bc=cb
Hence, the given expression is an example of commutative property.