${?}_{{?}_t\text{e}\text{n}\text{d}to\text{h}\text{a}\text{v}\text{e}\text{l}\text{o}\text{n}\text{g}\text{l}\text{i}\text{f}\text{e}\text{c}\text{y}\text{c}\text{l}\text{e}\text{s}of\text{t}\text{w}\text{o}\text{y}\text{e}\text{a}\text{r}\text{s}or\text{m}\text{o}\text{r}\text{e}\text{,}\text{l}\text{o}\text{w}\text{p}\text{r}\text{o}\text{f}\text{i}\text{t}\text{m}\text{a}\text{r}\text{g}\text{i}\text{n}\text{s}\text{a}\text{n}\text{d}\text{l}\text{o}\text{w}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{v}\text{a}\text{r}\text{i}\text{e}\text{t}\text{y}\text{.}}$

Question $1$ options:

a Functional products

$b$