Malcolm's two-year-old daughter throws a tantrum when she doesn't get what she wants. malcolm has decided to ignore his daughter whenever she has a tantrum. this is an example

a) extinction
b) distancing
c) reinforcement of alternative behaviors
d) delayed reinforcement

a) extinction.

Explanation: Extinction is a phenomenon whereby behaviors naturally fade away or stop over time when there are not rewarded or reinforced. Extinction is a behavioral phenomenon whereby non-reinforced conditioned responses fade away over time.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.