One of the methods used to reduce energy use is:
a. energy efficiency
c. energy conservation
b. energy reservation
d. energy holding

Energy conservation.

Explanation:

The method to reduce the energy usage is known as energy conservation. This process reduces the loss of energy and helps in optimization of energy.

The energy can be wasted if it is not used in a proper way. Resources are meant to be used in such a way it fulfills the demand of current generation and future generations.

The best way to save energy for future is to conserve energy and use it in a optimum way.

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.