During a respiratory assessment of an infant with respiratory distress syndrome, a sinking in the supraclavicular and intercostal areas of the thorax was noted with inspiration. This observation is documented as:

Retractions

Explanation:

Retraction is a medical terms used for problem associated with hard inhaling due to sinking of area between the neck and ribs. Due to sinking, The intercostal muscle between the ribs helps in filling air in the lungs by pulling the rib cage up. But when the trachea or airway of the lungs get blocked, the air pressure inside the chest reduces due to which the intercostal muscles are pulled inward and hence the retractions arise.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

hybridization actually occurs frequently in nature. evolution is derived from the process of hybridization that creates things with different traits. this leads to the species changing and evolution occurring. hope this : )