Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? birds ladybugs starfish snakes

i think the answer would be d

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

answer; ///(a) ;

answer///unconditioned stimulus;