The statement that is true is:
An ecosystem consists of living things that interact in the same environment.
This definition accurately describes what an ecosystem is, highlighting the interactions among living organisms and their physical environment.
While the other statements contain elements of truth, they are either misleading or inaccurate in their broader implications about biomes and ecosystems. For instance, biomes are large areas characterized by specific climate conditions and often contain numerous ecosystems, and they are not classified solely by factors like temperature and precipitation.