Question

which organism would be considered a primary consumer?
phytoplankton
sea lion
red crab

Explanation:

A primary consumer is an organism that eats producers. In this food web, seaweed and phytoplankton are producers (they make their own food via photosynthesis). The red crab eats seaweed (a producer), so it is a primary consumer. Phytoplankton is a producer, not a consumer. A sea lion (not shown in the given food - web elements in a direct way related to the initial producers in the provided diagram) is likely a higher - level consumer (if it were part of this web, it would eat primary consumers like the red crab or scallop).

Answer:

red crab