Which equation represents a reduction half-react

What is the difference between an igneous, sedimentary and metamorphic rock

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity