Approximately how many days does it take to complete 1/4 revolution?

A.30 B.7 C.3.5 D.15

D                                                                          

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