Which statement is supported by the energy pyramid?

The ecosystem can support fewer foxes than grasshoppers.
Foxes require less energy than birds.
The ecosystem can support more foxes than birds.
Grasshoppers require more energy than birds.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.