Answer:
The correct option is<u> D. chemical energy</u>
Explanation:
Cellular respiration can be described as a chemical reaction by which ATP is synthesized.
Sugar in the form of glucose and oxygen combine by this process to release water and carbon dioxide. ATP is generated by this chemical reaction which is an energy fuel. The ATP formed as a result of cellular respiration is used by the cells to carry out their normal functions. Hence, option D is the correct answer.
The reason that producers are found at the bottom of the trophic level is because producers eat plants and other things and other types of animals eat them and take their energy. Hope this helps.
The meaning of the scarce is insufficient for demands.
The scarcity of the food is determined by the availability of the food in the market. In case, the food available in the refrigerator is easily available in the nearby stores, then it is not scarce. In case, the food available in the refrigerator is not readily available in the market, then it is scarce.