Which of the following can lead to the formation of an ocean dead zone? Choose one or more: o phytoplankton blooms o overfishing o increased salinity o loss of nutrients in the water o ocean upwelling

1. phytoplankton blooms

Explanation:

A dead zone is a zone that is created by the presence of the dead and decomposing matter of the plant an abiotic component that depletes the oxygen and thereby creating a thick layer of nutrient-rich deposits in the aquatic environment that does not support the marine and fish life. They may result from agricultural, industrial and urban flows. And the changes that occur with the climate changes and the seasonal cycles of the earth. There are four types of dead zones classified on their lengths.

Permanent dead zone i. e the rarely exceed 2 milligrams per liter.

Temporal dead zones i. e the short-lived dead zone that lat flour hours a day.

Seasonal dead zones occur annually mostly in the summer months.

The hypoxic zone that occurs in the night time.

The baltic seas, Chesapeake bays, Lake Erie, and the other zone are affected by these blooms of algae and other foreign substances.