This is the most diverse of all the marine ecosystems. this marine ecosystem not only includes great biodiversity but at least one quarter of all ocean species depend on it for food and shelter. what is this marine ecosystem?
a) coral reef
b) kelp forest
c) coastal estuary
d) bathypelagic zone

How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.

I’m stuck on this question cuz i’m stupid sksksksk

Number and variety of living organism; includes genetic, species, and ecological types