Answer
$\text{Kind: }\text{
monomial
}\\\text{Degree: }
3+1=4$
Work Step by Step
The given polynomial expression, $
-a^3b
,$ has the following characteristics:
\begin{array}{l}\require{cancel}
\text{Kind: }\text{
monomial
}\\\text{Degree: }
3+1=4
.\end{array}