Greenhouses are buildings that are made out of transparent (see-through) materials, such as glass. They are used to keep
plants at a comfortable temperature. They work by allowing
the heat of the sun in, and then trapping some of the heat
from escaping the building, keeping the temperature in the
greenhouse warm.

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