The correct answer is: Individuals that produce chemical compounds are better protected from herbivores and are able to produce more young than individuals that do not produce the compounds.
Natural selection acts on variations-differences in phenotype that exist among individuals. If a certain trait contribute more to survival and reproduction (individuals with that variant survive more than individuals with other variant), natural selection will favor that trait. In this case, production of chemical compounds is favored over non-producing trait.
There are three species of wolves: the Red Wolf, the Gray Wolf, and the Ethiopian Wolf.
There are a lot more subspecies of wolves, such as:
Mexican Wolf
Eastern Wolf
Maned Wolf
Arctic Wolf
Iberian Wolf
Eurasian Wolf
Alexander Archipelago wolf
Alaskan Wolf
Alaskan Tundra Wolf
Greenland Wolf
Kishida Wolf
Manitoba Wolf
Plains wolf
Timber Wolf
Tundra Wolf
<span>d.involves accumulation of rhodopsin</span>
The answer is A, anti-fungal drugs.
According to the passage, "but if the problem persists, see a doctor who can prescribe anti-fungal drugs". In additional, at the beginning of the passage, it already stated that athlete's foot is caused by a fungus, so we can sure that the answer is A.