Given a scientific passage and an answer, generate a question for the given answer.

[Q]: Passage: An ecosystem includes the living organisms (all the populations) in an area and the non-living aspects of the environment ( Figure below ). An ecosystem is made of the biotic and abiotic factors in an area. Answer: ecosystem
[A]: What includes the living organisms in an area and the non-living aspects of the environment?

[Q]: Passage: Sources of voltage include electric generators and cells. Electric generators change kinetic energy to electrical energy. Chemical cells change chemical energy to electrical energy, and solar cells change solar energy to electrical energy. Answer: electrical
[A]: Electric generators change kinetic energy to what type of energy?

[Q]: Passage: When an element gains one or more electrons, an anion is formed. Nonmetals typically become anions when they interact with other chemical species. Answer: anion
[A]:
What is formed when an element gains one or more electrons?