Question

there is less life as you move down the oceans water column. this is because sunlight cannot reach these depths. sunlight is therefore a ______________ in the ocean.
carrying capacity
heterotroph
limiting factor
biotic factor

Explanation:

A limiting factor restricts the growth, distribution, or abundance of organisms in an ecosystem. Since sunlight is essential for photosynthesis and life - supporting processes, and its absence at ocean depths limits life, sunlight is a limiting factor. Carrying capacity is the maximum number of organisms an environment can support. A heterotroph is an organism that cannot produce its own food. A biotic factor is a living component of an ecosystem. Sunlight is an abiotic factor and a limiting one here.

Answer:

C. Limiting Factor