The order of a monomial or polynomial is equal to the highest degree among the terms in the expression. In this case, by the term 18 x the power of x is equal to 1, hence the order of classification is A. minomial. This is different when x has a different power.
Mostly bacillus (bacteria with cylindrical/rod shaped morphology) I'm pretty sure, you don't see any type of coccus (bacteria with spherical morphology) with flagella.
