Which is the most likely cause of the observed variation? differences in the climate among the islands
competition among individuals for available food sources
competition among individuals for desirable mates
differences in egg size among the populations

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.

it is either c or d and i know for sure it is not a or b