Where is the youngest crust material found on earth?

At divergent boundaries in the middle of the ocean (mid-ocean ridges)

=)

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

if you listed your answers right then i believe your answer is b.