Can someone me i am failing in this class plz btw its in science class

Which of the following is an oxidation-reduction reaction? (pictured below)

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

If the nucleus of a cell was removed the cell wouldn’t be able to make proteins because