The basaltic bedrock of the oceanic crust is classified as

The basaltic bedrock of the oceanic crust is classified as an aphantic igneous material that is primarily fine-grained. It is basically the most popular volcanic rock on our planet Earth, and is also considered as the fundamental element of the oceanic crust. This type of rock comes in gray to black in colour. 

Limnetic, profundal, littorala and benthic are B. all zones found in freshwater systems. Specifically, these zones are found in freshwater bodies such as lakes. These zones are specified based on their depth in the water body, and the increasing order of depth is the littoral, limnetic, profundal and benthic.