Answer: <em>C.) Cnidarians</em>
Quite sure C is correct ;) remember that humans are also placental mammals.
Okay, let's see...
In the center, we have the inner core, then the outer core, and then the slow moving mantle. On the outside, we have the crust a.k.a. where we live. =]
Answer:
capillary, arteries, veins
Explanation:
capillary are tiny blood vessels connecting arteries to veins
