Amensalism can be represented as :

Amensalism is a type of ecological interaction where one organism is harmed while the other experiences no noticeable effect.

To represent this relationship, we need to assign a sign to each species:

$Species\backslash \; A\backslash \; :\backslash \; (-)$ – the minus sign indicates that Species A suffers a negative impact (e.g., its growth is reduced or it is killed).

$Species\backslash \; B\backslash \; :\backslash \; (0)$ – the zero indicates that Species B is neither helped nor harmed; it remains unaffected.

Thus, the correct symbolic representation of amensalism is:

$Species\backslash \; A\backslash \; (-)\backslash \; ;\backslash \; Species\backslash \; B\backslash \; (0)$

This matches the definition of amensalism, where the affected organism (Species A) incurs a loss (−) and the other organism (Species B) shows no change (0).