How is the active soil and permafrost layered? What does this imply about their relative ages?​

i think that c)gold was found there

but i am not sure

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.