Final answer:
The correct answer is e. an ecosystem with high nutrients with high biodiversity because upwelling brings nutrients from the ocean depths to the surface, promoting photosynthesis and supporting a diverse range of life.
Step-by-step explanation:
In considering an upwelling ecosystem with no light limitation, we want to look for options that reflect high productivity due to abundant nutrients, which are brought to the surface from the depths of the ocean. The correct answer is e. an ecosystem with high nutrients with high biodiversity. Upwelling zones are known for their high nutrient levels, which support a wide variety of life. Hence, when an upwelling occurs, the nutrients from the ocean depths are brought to the surface, supporting photosynthesis and a diverse ecosystem, even without light constraints. High biodiversity, in turn, indicates that there's a large variety of organisms successfully exploiting the available nutrients and light.