${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}\text{o}\text{r}\text{i}\text{g}\text{i}\text{n}\text{a}\text{t}\frac{e}{s}\text{f}\text{r}\text{o}\text{m}\text{t}\text{h}\text{e}\text{p}\text{r}\text{o}\text{c}\text{e}\text{s}\text{s}of\text{s}\text{a}\text{f}\text{e}\text{t}\text{y}\text{h}\text{a}\text{z}\text{a}\text{r}\text{d}\text{i}\text{n}\text{t}\text{e}\text{r}\text{a}\text{c}\text{t}\text{i}\text{o}\text{n}\text{a}\text{n}\text{d}\text{e}\text{n}\text{e}\text{r}\text{g}\text{y}\text{e}\text{x}\text{c}\text{h}\text{a}\text{n}\text{g}\text{e}\text{.}}$

Select one:

$a.$

Accident$-$incident causation

$b.$

Temperature

$c.$

Safety risk

$d.$

Behaviour$-$based safety factors