This expression has 1 term. Why? A term consists of a set of numbers with or without any basic operations. For example, Terms can be represented as 1x + 6. That is two terms because they are separated with an addition sign. So from that knowledge, let's see our options.
1.) Cubic Monomial. Cubic is any number raised to the third power. Since the x is raised to the third power, you can figure it out easily. This only has one term therefore, it is a Monomial. Monomial has a prefix of "Mono=One"
2.) Quadratic Monomial. There is no value raised to the 2nd power (Quadratic)
3.) This only has one term therefore cannot be a Trinomial (Three terms)
Number 1 is the best choice.