In commensalism,

Mycorrhiza is an example of which of the following?

If the '$+$' sign is used for a beneficial interaction,the '$-$' sign for a detrimental interaction,and the '$0$' sign for a neutral interaction,then which population interaction is represented by '$+$' and '$-$'?

Statement $-I:$ The interaction where one species is benefitted and the other is neither benefitted nor harmed is called commensalism.
Statement $-II:$ Barnacles growing on the back of a whale is an example of commensalism.

Which of the following definitions is most appropriate for competition?

What is the interaction between two species called?