Can someone plz help me with this

Which are observations about the tree on the right ,? check all that apply

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

What element is able to combine with itself and hydrogen to form large molecules ?