Which function does a phytoplankton have in ocean ecosystems? a. producer b. consumer c. scavenger d. decomposer

Phytoplankton is one of the best examples of A. producers of ocean ecosystem.  

Since the seas on Earth are so tremendous, the atmosphere shifts drastically. Warm tropical waters along the bank of the equator feel about like shower water. These spots are home to unimaginable biodiversity. However, the solidifying waters of the Arctic have their very own biological system as well, regardless of the temperature. Indeed, even the bone-squashing profundities of the remote ocean are home to stunning kinds of life.  

Coral reefs live in the shallow, warm waters close to the bank of the equator. The producers in all seas, including the coral reefs, are fundamentally algae and phytoplankton, minuscule photosynthetic living beings that produce nourishment from water and daylight.

a time line cause it goes from 685 to 978