What type of evidence is the best indicator of how closely two species are? explain your answer

Maybe you could study their traits and how they live such as what they eat how they live or how they build there homes and their instincts or you could look at the markings like ducks feet are webbed can other birds feet be webbed what kind of colors do they have eyes body parts such as wings or extra body parts I'm sorry if this is not what you are looking for I'm new to this

Adialysis unit requires 78.5 l of water.the estimated digit is 5.