You are presented with the question "What can make photosynthesis more accessible to surrounding plants?" and the following answer choices: 
- Energy.
 - a giant earthquake
 - circulatory systems
 - organic molecules
 - a tree falling
 - a huge fire
 - a great flood
 - Solar energy

Now knowing that if a tree falls then sunlight becomes available to the surrounding plants and plants use sunlight for photosynthesis, choose the best answer.


 

     a tree falling    