Answer:
the answer would be A and B
The force ffrom the ground that holds the rock up and prevents her from falling through the gound, unless the ground breaks.
Right Atrium, Left Atrium, Pulmonary Trunk, Left Pulmonary Artery, Right Pulmonary Artery, Right Ventricle, Left Ventricle, Inferior Vena Cava, Superior Vena Cava, Acending Aorta, Aortic Arch, Apex, Left Pulmonary Veins, Right Pulmonary Veins, Brachiocepalic Artery, Ligamentum Arteriosum, Auricle, Left Common Carotoid Artery, Left Subclavian Artery, Anterior Cardiac Vein, Anterior Interventricular Artery, Left Coronary Artery (in coronary sulcus, left coronary groove), Great Cardiac Vein, Marginal Artery, Small Cardiac Vein, Right Coronary Artery (in coronary sulcus,Right coronary groove)
Here hope this helps:)
Im sure what is broken down is glucose.
(Anyone feel free to correct me if you think I'm wrong)
When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of a star