9u²v and which term are like terms?

I attached a diagram with the complete expression.

5vu² is like 9u²v

Explanation:
Like terms are terms having the same degree for all variable it contains

The given term has two variables:
u² and v
This means that the term that is considered to be like this one should also have the variables u² and v.

Taking a look at the given terms, we would find that the only term satisfying this condition is 5vu².

Hope this helps :)