Barnacles and Whales are symbiotic relationships together.
Option (a);
<u>EXPLANATION: </u>
Symbiotic relationship means when two different organisms interact physically and one of them is at least benefited due to that interaction, such that having an interdependent relationship with others.The first statement clearly explains the meaning of the symbiotic relationship that takes place between Barnacles and Whales.
These barnacles attach themselves to whales and both the animals are benefited from each other. The whales seek help from barnacles by the means of food resources and also they took shelter from the protective spin barriers of the barnacles. In other options, symbiotic is not mentioned properly.
