Which example best shows an athlete applying the biomechanical principle of balance?

a bowler quickly approaches the lane and releases the ball toward the head pin.
a shortstop stands with a wide base, knees bent, and body straight up.
a basketball player grips the ball and leaps toward the basket to perform a slam dunk.
a quarterback fades back in a five-step drop and scans the field for an open receiver.

An 80-year-old woman comes to the urgent care clinic with dyspnoea on exertion. on physical examination, her blood pressure is 100/70, and her pulse is 75. she has no pulsus paradoxus. her jugular veins are distended, and she has distant heart sounds. in addition, she has extra third and fourth heart sounds. her liver is enlarged, and she has pedal oedema. she has occasional premature ventricular contractions on her electrocardiogram. a chest x-ray reveals clear lung fields with a dilated cardiac silhouette. her echocardiogram reveals ventricular walls with a "speckled pattern". which of the following is the most likely diagnosis? - alcoholic cardiomyopathy- amyloidosis- haemochromatosis- tuberculosis- viral myocarditis