Final answer:
A monomial is indeed a polynomial; it is a polynomial that consists of exactly one term. Thus, every monomial can be classified as a polynomial, which might include multiple terms, such as binomials and trinomials.
Step-by-step explanation:
You asked whether a monomial is also a polynomial. The answer is A. True. A monomial is a special case of a polynomial. It is a polynomial with only one term. To explain further, a monomial is an algebraic expression that contains only one term, such as 5x2 or -3. A polynomial can consist of one or more terms, which means every monomial can actually be considered a polynomial with a single term. Polynomials include monomials, binomials (like x + 2), trinomials (like x2 + 3x + 4), and other multi-term expressions. Therefore, we can classify monomials under the larger umbrella of polynomials.