Question

what chemical is needed to break down (\burn\) the glucose molecule? 20 carbon dioxide water oxygen lactic acid

Explanation:

To break down glucose (cellular respiration or combustion), oxygen is required. Glucose reacts with oxygen to produce energy, carbon dioxide, and water. Carbon dioxide is a product, water can be a reactant in some processes but not for glucose breakdown here, and lactic acid is a product of anaerobic respiration (not the main breakdown of glucose "burning" which is aerobic). So the correct chemical is oxygen.

Answer:

The correct option is the one with "oxygen", which is the orange - colored option (assuming the orange option is labeled with a circle and "oxygen"). In terms of the option format: The option with "oxygen" (the one with the white circle icon and the text "oxygen"). If we consider the options as:

• (Red, triangle) carbon dioxide
• (Blue, diamond) water
• (Orange, circle) oxygen
• (Green, square) lactic acid

Then the answer is: The option with the orange background, white circle icon, and text "oxygen" (or in the format of the option's identifier and text, e.g., if we assign identifiers as A: carbon dioxide, B: water, C: oxygen, D: lactic acid, then C. oxygen).