Final answer:
The organism that most likely has 10% of the Sun's energy available for its use in the forest food web is A. Insects
Step-by-step explanation:
In the food web provided, the energy from the Sun is first captured by the elm tree, which is a producer. The elm tree transfers some of this energy to the insects that feed on its leaves. These insects then become a food source for other organisms in the web, such as birds and snakes. As energy flows through the food web, only about 10% of the original energy from the Sun is available at each successive trophic level.
Therefore, the insects in the forest food web are most likely to have 10% of the Sun's energy available for their use, based on the transfer of energy through the trophic levels. The correct answer is A. Insects