A population of lizards that originally had no predators lived on a small isolated island. Predators of the lizards were accidently introduced to the island from a visiting ship. The graph shows how the average leg length of the surviving lizards changed over time once the predator was introduced. Which statement could explain the graph above

Lizards with longer legs can escape predators

Explanation:

On the island of lizards with no predators, any phenotype could survive since there was no selection pressure. Once a predator arrived on the island morphology became a selection pressure. This means that escaping a predator gave this individual a chance for survival. It also means that those that were not able to escape could not procreate and their genetic line was cut off or reduced. Survival of the fittest became the lizards with longer legs. These traits were passed on from the survivors.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.