Red$-$cheeked salamanders are partially protected from predators because of cardiac glycosides they produce from glands on their back. When ingested, cardiac glycosides disrupt normal heart rhythms$.$ A different salamander species, the imitator salamander, also has red cheek patches, but does not produce cardiac glycosides. It does gain protection from predators that have learned to avoid red$-$cheeked salamanders. This relationship has which of the following effects on the population dynamics of both species?

$$Both species are negatively affected.

$$The red$-$cheeked salamander is positively affected; the imitator is negatively affected

The red$-$cheeked salamander is not affected; the imitator is positively affected

Both species are positively affected