For this problem, the most probable and the most likely answer for this would be the second option which is cells.
When viewing, not just corks, but other things under a microscope, may it be a home-made one or of something in value or a technologically advanced microscope, small compartments would always be visible under these lenses and they are cells. Some might look like boxes but they are cells. These cells might come in many sizes, but they will always be cells. Cells are everywhere.
The answer to your question is soil
Answer:
A natural ecosystem has a diverse amount of species and plants, whereas artificial ecosystems are limited.
Explanation:
Natural ecosystems are self-sustaining and result from spontaneous natural reaction, while artificial ecosystems require the assistance of humans.
E) Energy Pyramid
Technically it's an ecological pyramid, but E seems to be the closest to that.
