Answer
$A\times B=\{(reduce,plastic),(reuse,plastic),(recycle,plastic)\}$
Work Step by Step
$A\times B$ is a set of ordered pairs, where each element of A is mapped to each element of B. The element from A appears as the first element in the ordered pair.
$\ \ \ reduce\rightarrow\ \ |\overset\rightarrow\ plastic$
$\ \ \ reuse\rightarrow\ \ \ \ |\overset\rightarrow\ plastic$
$\ \ \ recycle\rightarrow\ \ |\overset\rightarrow\ plastic$
