Answer:
The correct answer to the question is C. Estuary
Step-by-step explanation:
An estuary is an aquatic ecosystem that is characterized by changing salinity levels, high levels of nutrients, and many young fish and shellfish.
Estuaries are areas where freshwater from rivers and streams mix with saltwater from the ocean. This mixing of waters creates an environment with varying levels of salinity. During high tide, the estuary may have a higher salt concentration, while during low tide, the salinity decreases as more freshwater enters the system.
Estuaries are also known for their high levels of nutrients. The freshwater runoff from rivers and streams carries nutrients such as nitrogen and phosphorus into the estuary. These nutrients support the growth of phytoplankton, which are tiny floating plants. The phytoplankton form the base of the food chain in the estuary and provide a food source for many young fish and shellfish.
The high nutrient levels and abundance of young fish and shellfish make estuaries important nurseries for many marine species. The young fish and shellfish find shelter and abundant food in the estuary, allowing them to grow and mature before they move out into the open ocean.
In summary, estuaries are characterized by changing salinity levels, high levels of nutrients, and many young fish and shellfish. They are important ecosystems that serve as nurseries for marine species