The beginning developmental stages of all five species are very similar, including the presence of gills in each one. As they continue to develop, however, distinct differences become obvious. What does this imply about these species?

the answer is b

explanation:

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

i think the answer is a.keratin is the pigment responsible for skin color.