Question

which is true of heritable variation?
a variation that causes a species to branch into two
the variation can be good, bad, or have no effect at all
the variation is always beneficial

Explanation:

Heritable variation refers to genetic differences among individuals. These variations can have different impacts. Some may be beneficial (e.g., a mutation that confers disease resistance), some may be harmful (e.g., a mutation causing a genetic disorder), and some may have no noticeable effect (e.g., a silent mutation that doesn't change the protein structure). It's not always the case that heritable variation causes a species to branch (speciation is a complex process involving multiple factors beyond just a single variation), and it's definitely not always beneficial.

Answer:

the variation can be good, bad, or have no effect at all