Why does water run through gravel quickly? A. Gravel has a high porosity (lots of holes)
B. Gravel has a low porosity (few holes)
C. Gravel does not have a porosity which makes the water move quickly

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid