You are presented with the question "what does energy enter in the form of sunlight or chemical compounds?" and the following answer choices: 
- Generating heat
 - volume
 - colors of the spectrum
 - organisms and their habitat
 - density
 - Transfers energy
 - gravity
 - it helps plants in growing

Now knowing that energy enters ecosystems in the form of sunlight or chemical compounds and an ecosystem includes the organisms and their habitat, choose the best answer.


 

    organisms and their habitat     