Class Reptilia and Class Amphibia share many traits, but reptiles are able to inhabit many areas that amphibians cannot. Which of the following reptile traits is most responsible for this ability? A) four limbs B) internal bones C) teeth D) the amniotic egg E)lungs

D

Explanation:

Amphibians have eggs that need to be constantly submerged in water. The amniotic egg is like a chicken egg. It doesn't need to be submerged in water, but it does need to be kept warm.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

the right option is; decreased genetic variation  

decreased genetic variation describes the effect of this environmental change.

genetic variation is the naturally occurring genetic diversities or differences between organisms of the same species in a population. genetic variation allows the survival and adaptability of a species when they encounter changing environmental conditions. when an endangered species reduces, it loses genetic variation which may not be restored even if the species rebound and will only be recovered through the gradual collection of mutations over many years.