The diagram shows embryo development of four different animals how is this evadance used to sugest that life chaneges over time k12

The answer is ( In the early stages the embryos of four different species will look the same .For example, fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before birth. That what makes them different.)

The zone your looking for is the intertidal zone.