Cold front brings a sudden drop in temperature sometimes with hail , thunder , and lightning . Warm fronts bring gentle rain or light snow , followed by warmer , milder weather . Stationary front brings a cold and warm air together and neither air mass has the force to moved the other . Occluded front brings a warm air mass that gets caught between two cold air masses .
Answer;
D. The birds have different mating seasons.
Explanation;
-Different species of birds have different mating or breeding seasons. Evolution has played a role in adjusting the timing of avian(birds) breeding seasons to maximize the number of young produced. The breeding season depends on a number of factors, for example In the temperate, subarctic, and arctic zones, the overriding factor is the availability of food. This varies across all different species of birds, irrespective of other similarities they may have.
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Dilated cardiomyopathy is a heart disease which causes the heart chambers to thin and stretch , growing larger. It make it harder for the heart to pump blood to the rest of the body.
Extensive molecular alteration is failing heart at single cell resolution by single nucleus RNA which is nearly 600,000 nuclei in left .It occurs when heart's blood pumping Chambers's chambers enlarge or dilated. It occurs because the heart's walls became thickened , which makes it harder for the heart to pump blood.
when hypertrophy cardiomyopathy , ventricles size remains normal and thickening of the walls may block blood flow out of ventricles. This happen by progressing to dilated cardiomyopathy is rare.
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