Question

if a mutation introduces a new skin color in a salamander population, which factor could determine whether the frequency of this skin color will increase among the population?
○ whether it will make the salamander more fit to survive
○ how many other colors are present in the population
○ how many phenotypes the population has
○ whether the mutation was natural or artificial

Explanation:

In evolutionary biology, a mutation that increases an organism's fitness (ability to survive and reproduce) is more likely to increase in frequency in a population. If the new skin - color mutation makes the salamander more fit (e.g., better camouflage, less predation, more successful mating), natural selection will favor it, and its frequency will increase. The other options are less relevant: whether the mutation is natural or artificial (mutations are usually natural, and this doesn't directly determine frequency change), how many phenotypes the population has (a general characteristic not specific to this mutation's success), and how many other colors are present (again, not directly related to the success of this particular mutation).

Answer:

whether it will make the salamander more fit to survive