What caused earth to devolep layers as it cooled

answer; i believe the answer is (polygenic inheritance;

answer an inhibitory neurotransmitter in the brain;

the jugular venous disention can be a sigh of problems starting with the heart specificaly the right side. with the evidence pressent he may have a blocage in a vein or artery due to a blood clot forming in the surggery. its a theory

option d : from a warmer substance to a cooler substance

according to second law of thermodynamic, heat flows from higher to lower temperature region. heat is the transfer of energy from an object at higher temperature to an object at a lower temperature. so energy flows from warmer to colder objects.