During respiration carbon dioxide and water are combined to make glucose oxygen and water are combined to make glucose carbon dioxide is used to break down glucose into energy oxygen is used to break down glucose into energy

-Oxygen is used to break down glucose into energy.

Explanation:

Cellular respiration involves breakdown of organic molecules, such as glucose to release energy. Cells use oxygen to breakdown glucose molecules to release energy in the form of ATP molecules, along with water and carbon dioxide.

It is divided into three steps, glycolysis, Krebs cycle, and electron transport chain. By one glucose molecule, a total of 36 ATP molecules are produced during cellular respiration, which are used as energy currencies of the cell.  

Thus, the correct answer is 'last option.'

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.