Which of these is a biotic factor in a river ecosystem? 1. the types of microorganisms that live in the river water

2. the amount of soil and other particles carried by the river

3. the speed at which the river water flows toward the ocean

4. the amount of rain that flows off the land and into the river

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