A broad land or ocean region defined by climate, geography, and producers is called

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An ecoregion is the best choice because it refers to a region defined by climate, geography, and producers, and is used by ecologists to study patterns of biodiversity and ecosystem function. The other options do not encompass all three of these defining factors. A hot spot typically refers to a region with high levels of biodiversity and endemism, but does not necessarily consider climate or geography. A realm refers to a large biogeographic region based on shared flora and fauna, but does not necessarily consider specific producers or climate. Habitat islands refer to isolated patches of suitable habitat within a larger matrix of unsuitable habitat, and the biosphere refers to the entirety of Earth's living systems.

A Broad Land or Ocean Region Defined by Climate, Geography