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a population of lizards lived in an ecosystem that was prone to flooding. after many generations, most of the lizards in the population had longer legs than their ancestors, which them flee from floods. which statement best explains this change? a. the lizard genes spontaneously mutated to address the flooding threat. b. genetic variation among lizard limbs allowed for natural selection to occur. c. the limbs were artificially selected because humans probably caused the flooding. d. the lizards with longer limbs cloned themselves, ensuring survival of the species.

The answer is letter B, Genetic variation among lizard limbs allowed for natural selection to occur.

Explanation:

The example situation above is related to biological evolution among species. In order to adapt to the changing environment, the lizard evolved by having longer legs that would enable it to survive even in areas prone to flooding.

This is backed by Charles Darwin's Theory of Natural Selection. According to this theory, the organisms that are able to adapt to their changing environments have a higher chance of survival compared to those that didn't. This change is caused by the variations of traits in individual species while they interact with their environment. This allows the organism to survive over time.

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

the pic attached shows the stages of mitosis. hope it !