Most of the energy used by organisms comes from the sun. Which sentence from the article provides the BEST support to the statem
ent above? (A) This energy must be available within an ecosystem, or a community that consists of all the living and nonliving things in an area, including soil, plants and animals. (B) Plants and other organisms convert the sun's energy, or solar energy, into biomass, which is the energy that is part of living organisms. (C) Herbivores are animals that only eat plants, and omnivores are animals that eat both plants and animals. (D) Five is the maximum number of trophic levels most ecosystems can support.
A change in the color of a substance -- this one is indeed a chemical change. Think of iron, if iron turns reddish, it's a completely different substance.