Question

Barnacles attach to shellfish for transportation. The shellfish is not helped or harmed. This is an example of_

Answer 1

The correct answer is:

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                       →    " commensalism" .

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Note: "Commensalism" refers to a symbiotic relationship {"symbiosis"}  between two (2) organisms — in which one organism benefits and the other organism is neither helped nor harmed.  

              { i.e.  " +, 0 " ;  that is:  "plus" sign for "one organism benefits" ;

                       "zero" sign for "neutral" ;

                    (in that the other organism is neither helped nor harmed.}.

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In the example given in the question, the two (2) organisms are:

 1)  the barnacles;  and:  2)  the shellfish.

       The barnacles benefits by given a place to attach for the purpose of transportation (by using the shellfish to "cling to"}.  

      The shellfish are neither helped (benefitted in anyways from the attachment from the barnacles— nor are the shellfish harmed in any way.

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Hope this answer helps you!

     Best wishes in you academic pursuits

               — and within the "Brainly" community!

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