Is harvesting energy from the volcanos important?

What is the function of the organelle labeled a in the diagram?

Which one of the following is not a good procedure to follow if you wish to avoid being rear ended by another vehicle

The color contrast between the open ocean and the lagoon between the spit and the mainland. the greater concentration of suspended sediments in the lagoon gives the waters a more turbid appearance. the source of sediment in the lagoon is (are) [(rivers and streams from the mainland) (wind-borne sediment from the spit) (ocean waves washing over the spit) (all of these contribute)].