If you consider the combined processes of photosynthesis and cellular respiration, the electrons found in H 2O at the beginning of the light reactions end up attaching to during respiration.

to form

Explanation:

The electrons start their journey through metabolism in and end in the that is made.   serves as the final electron acceptor in oxidative phosphorylation, so as to combine with protons to make new "metabolic" water.

the answer to your question is slate

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above