Question

what is advantage of four chambered heart

Answer 1

The four chambered heartprevents the mixing of onygenated and deoxygenated blood.

By keeping the two types of blood separated, their efficency for supplying o2 to the blood increses.

Birds and mammals cnsistantly use energy to maintain their body temp. as they are warm blooded animals.

 thus, these are the advantage of having a four-chambered heart.

Hope it helps.

Answer 2

advantages are
by 4 chambered heart the blood can be separated  from oxygenated and deoxygenated blood
the process of pumping of blood becomes more easy
it makes different chambers for different process