Final answer:
b. resource partitioning. The concept demonstrated in Stomp's experiment is resource partitioning.
Step-by-step explanation:
The concept demonstrated in Stomp's experiment on the outcome of competition between two types of cyanobacteria found in the Baltic Sea based on available light wavelengths is resource partitioning. Resource partitioning occurs when two species occupy different microniches within the same habitat, minimizing direct competition for resources. In this case, the different types of cyanobacteria occupy different wavelengths of light, allowing them to coexist by reducing competition for that resource.