Question

how can heritable variation increase fitness?
heritable variations always lower fitness.
variations decrease the population size and make the population less desirable to predators.
the inherited variations create new adaptations that help an organism survive and pass them on.

Explanation:

Heritable variation can lead to new traits. If these traits are beneficial (like better camouflage or more efficient foraging), they increase an organism's chances of survival and reproduction. This is in line with the principles of natural selection. The first option is incorrect as heritable variations don't always lower fitness. The second option is also wrong because variations don't necessarily decrease population size in a way that makes the population less desirable to predators in a fitness - increasing sense. The third option correctly states that inherited variations can create new adaptations that aid survival and passing on genes.

Answer:

The inherited variations create new adaptations that help an organism survive and pass them on.