Q: What can demonstrate the decrease in energy, biomass or numbers within an ecosystem?


Read this paragraph and choose the correct option from the provided answers:

Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem. Energy pyramids are discussed at http://www. youtube. com/watch?v=8T2nEMzk6_E (1:44).

 Choices:

- biomes

- spontaneous mutation

- food chains

- ecological pyramids


A:
ecological pyramids