Answer:
Starting blocks are a device used in the sport of track and field by sprint athletes to brace their feet against at the start of a race so they do not slip as they stride forwards at the sound of the starter's pistol. The blocks also enable the sprinters to adopt a more efficient starting posture and isometrically preload their muscles in an enhanced manner. This allows them to start more powerfully and increases their overall sprint speed capability.
Explanation:
Answer:
A. Independent variable
Explanation:
Independent variable is one that represents a variable that influences or affects another variable. Independent variables are the determining factor, condition, or cause for a given outcome, effect, or consequence. They are also the factor manipulated by the researcher in order to determine the factor's relationship with the observed phenomenon, to see what influence it has on a possible outcome. For this reason, we can say that the example of the independent variable that is presented in the question is price changes.
your answer would be:
aorta
left common carotid artery
left external carotid artery
left facial artery
zygomatic tissues
left facial vein
left internal jugular vein
left subclavian vein
left brachiocephalic vein
superior vena cava
